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A collection of problems illustrating how to use MathObjects when writing WeBWorK questions.

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Adding Complex Variables problems.

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First example of embedding a flash applet into a PG problem.

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This problem seems to be coded incorrectly. The answer for the slope is coded as $m1 instead of $m2 Bug reported by Sanchis, Gabriela

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Transferring John Jones fix from the national ProblemLibrary to the rochester one.

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update to work with WW2

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fixed small typo

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update files so that everyting works with WW 2

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Test commit

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Change range of exponent fron 5 to 50 to 5 to 15. Larger exponents give numerical errors.

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Fixed bug reported by Andy

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fix minor typo

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Fixed typo removing erroneous word not

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minor bug fix. I should test these before committing.

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don't leave space arround quotes.

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str_cmp options were not allowed

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fixed bug now that blank answers are not allowed

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Fixed bug (wrong sign in first part) reported by Knightly

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Fix bugs reported by Knightly

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Fix bug submitted by Andy Knightly

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remove +C from the answer to a definite integral

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replace "at" by "a t" in function since "at" is not processes as a times t"

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Changed tol required from 7 to 5 places as per Mike's suggestion.

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*** empty log message ***

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imported graphics

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*** empty log message ***

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*** empty log message ***

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Fixed wording

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Fixed problem to accept blank answer as correct

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Fixing earlier error caused by massive replace: Apparently, it converted ~~&ans_array_filter to ~ANS_array_filter, so the prefilter is not being set properly in these problems any more. Converted at least some of these entries back to the correct original. this fixes bug #871

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Use ft*lb not lbf I don't think that is a correct abbreviation.

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Added a sequential problem example where the debugging code has been turned off.

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Change range of exponents on constant term so that it's unlikely that a simple incorrect answer will be scored as correct.

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Clear up confusing wording

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fixed a typo involving \, in an equation. The TeX was not correct but was accepted by dvipng. It caused problems for jsMath.

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Fixed typo involving left and right braces. $LB (left brace) and $RB are meant to be used in math mode.

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Updating pdf files

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Bug Fix. Removed offending baskslash

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A few set definition files didn't have the rochesterLibrary/ prepended

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use unions=>'no' in interval_cmp

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Add unions=>'no' to call to interval_cmp

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change call to interval_cmp to interval_cmp( "($a1, 0)", unions=>'no' ) );

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During the recent update, Mike inadvertenly prependered rochesterLibrary/ to the setNumber= line (usually the first line). This made the set definition files unreadable. This has now been fixed.

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removed invalid link

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made a small change

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Prepend all file references with rochesterLibrary so that these definition files can be used in the Library browser. (This assumes that one uses the convention of linking rochesterLibrary to rochester_problib.)

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Fixed problem in which some TeX commands were not being run through EV3

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Modifications to second sequentialProblem

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Fixed documentation

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Removed this problem since it still had testing code in it.

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removing expired html links

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Description of the sequential problems

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Two example sequential problems. These are still quite experimental.

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Replacing std_num_cmp by num_cmp, etc. etc. This should make the code for our files more regular and reduce the number of macros that need to be documented. These macros are now combined into one macro with various options.

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Replacing std_num_cmp by num_cmp, etc. etc. This should make the code for our files more regular and reduce the number of macros that need to be documented. These macros are now combined into one macro with various options.

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Fixed error in answer. This closes bug #786

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Closes bug number 776. The error was caused by test code that wasn't even being used.

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Fixed typo in 6_2. Fixed bug in 6_8.pg. This closes bug $718

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Formatting change -- replaced function_cmp by fun_cmp

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Formatting change.

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Cleanup. Removing comment

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Fixed error in which the check for determinant ==0 missed a case where the determinant was E-10. New version rejects problems where the determinant is less than E-5.

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Fixed error in answer. This closes bug #737

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Fixed error in statement. This closes bug #735

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updated version

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invalid date/time fixed (don't use 2:00 am -- it might be the switchover to day light savings time)

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original date invalid (maybe because of daylight saving time switch?)

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updated set definition file

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added new problems

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From Maria

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From Maria

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Maria's changes

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Changing ANS_rule to ans_rule to correct previous cleanup of problem syntax.

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Changed ANS_rule to ans_rule

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ans_rule not ANS_rule

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Cleaned up &beginproblem and &ANS old style function reference.

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Fixed an empty set symbol

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Cleaned up &beginproblem and &ANS style function references.

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Fixed bug reported bt Lars

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new prob

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added new problems

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John Jones fixes.

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Fixed length of answer box. Arnie

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Fixed bug reported by John Jones Arnie

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Fixed display of the "TeX" equations in the header. Cleaned up the code to some extent.

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Initial Commit

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Initial commit

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initial commit

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Initial commit

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fixed miss spelling of eigenvalue.

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Fixed small bug No 738.

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Fixed a bug that arrised sometimes that was reported by Alberto Candel Arnie

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Display a correct solution (one of many) Arnie

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Fixed bug in the solution Arnie

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make the code more numerically stable. Arnie

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Use absolute tol Arnie

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fixed floating point error Arnie

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Fixed bug Arnie

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fixed bug Arnie

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Fixed bugs Arnie

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Use phrasing from ASU Arnie

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Fixed how the polynomial is idplayed whrn a coef is zero Arnie

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Tix bug reported by Lars. Arnie

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minor change

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Fixed many bugs. Arnie

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Fix another bug reported bt Alberto. Arnie

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Fixed bug reported by Alberto Candel Arnie

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The original version of this problem was correct (even though 3 prof's did it wrong). Arnie

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Fixed bug reported by AAron Heap Arnie

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Fixed bug reported by Lars. Arnie

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replaced string_cmp with interval_cmp Arnie

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Fix bugs Arnie

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Use interval_cmp instead to string_cmp to allow more flexibility Arnie

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Change range of exponent fron 5 to 50 to 5 to 15. Larger exponents give numerical errors. Arnie

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Add problem ur_dr_5_22.pg Arnie

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modified version of the original ur_dr_21.pg problem where the domain is restricted to (0,.5) and e is used inplace of 2.71828182845905 Arnie

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In the answers use e instead of 2.71828182845905 Arnie

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Set limits so that square roots should be evaluated at positive values Arnie

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Change problem so that only sq routes of positive numbers are ever taken. Arnie

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Fixed bug which prevented students from entering new increments Bug reported by Daniel Heath Arnie

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Fixed bug that could lead to infinite loop. Arnie

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Make labels string, i.e. 'A' not A since E evaluates to 2.718281828 which itself is a bug. Arnie

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Fixed bugs reported by Jerry Porter Arnie

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Make graphs bigger. does not appear to work with MSIE Arnie

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Fixed bug reported by Lars. Arnie

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Changed log to ln Arnie

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changed log to ln Arnie

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Change log to ln Arnie

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Changed log to ln so problem will work even if log is the base 10 log. Arnie

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Fixed bug submitted by Thomas Hagedorn Arnie

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Fixed another bug caught by Bill Emerson Arnie

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Fixed bug reported by Lars Arnie

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Fixed bug reported by Lars Arnie

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Fixed bug reported by Bill Emerson Arnie

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fixed bugs reported by Maria Arnie

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new problems from M Knapp Arnie

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new problems Arnie

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Formatting cleanups on the tutorial problems. These problems no longer self set seeds -- that can be done using the Library Browser. --Mike

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use fun_cmp not num_cmp Arnie

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Better way to fix bug Arnie

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Fixed display bug Arnie

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Fixed bug caught by Bud Boman Arnie

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Fixed subtle bug in problem Arnie

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updating pdf's Arnie

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corresponding changes to definition files

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added new problems

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Updating pdf files Arnie

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Should have been removed last year Arnie

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Should have been removed last year Arnie

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Fixed TeX bug Arnie

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Fixed TeX bug Arnie

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Corrected (hard to find) bug in problem. Arnie

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fixed error Arnie

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fixed TeX bugs Arnie

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fixed TeX bugs Arnie

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fixed bug in problem Arnie

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Fixed error (unquoted string) Arnie

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Fixed TeX bug Arnie

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Fixed TeX bug Arnie

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Fixed TeX bug in problem Arnie

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Fixed bug in problem Arnie

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Removed unneeded line which gave erroneous info and also caused a TeX error. Arnie

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Fixed bug in TeX allignment symbols Arnie

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fixed bugs Arnie

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added missing \} Arnie

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EV3 doesn't work in HINT, EV2 does. Arnie

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updare Date Arnie

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Fixed bug caused by extra ) Arnie

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adding missing files Arnie

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These problems, written by Bill Wheeler, use objects defined in Polynomial.pm, PowerPolynomial.pm, Fractions.pm, and PGcombinatorics.pl

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Replace JJ_ans-eval.pl by extraAnswerEvaluators.pl Arnie

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Replace JJ_ans-eval.pl by extraAnswerEvaluators.pl Arnie

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Added $recordSubmittedAnswers =0 since this is supposed to be an naonymous survey. Arnie

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Change due dates so this appears with other sample sets. Arnie

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This problem used PGsort as a hack. Changed the call to PGsort to reflect the new version of PGsort. Arnie

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removed the deprecated $BM and $EM

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Replaced the deprecated ${BM} and ${EM} for compatiblity to webwork 2.0

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Two examples of using Frank Wattenberg's lite applets in a pg problem.

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removed

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cleaning up

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added files

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added new files

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adding some files

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Rick Lavine corrected this problem. Arnie

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Fixed bugs in problem Arnie

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fixed error in answer Arnie

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Added two new problems by Rick Lavine Arnie

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New problem by Rick Lavine Arnie

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Use avg_problem_grader inplace of std_problem_grader. Makes problem less frsutrating for students. Arnie

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Changed parameters so that Romberg integration does not ever result in a divide by zero. Arnie

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Fixed bug reoprted by Mike Knapp. Need to use function_cmp, not function_cmp_up_to_constant. Arnie

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Fixed problem so that the answer function is evalauted in a domain wher it is defined. Arnie

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fix domain on which answer is evlauated. Also step size. Arnie

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Clean up problem (use e rather than 2.7...) and also check answer on a more reasonable domain Arnie

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Evaluate solution in a more reasobable range. Also clean up display. Arnie

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Changed line 22 according to Coreen Metts bug fix of a bug reported by Tom Hagedorn. Arnie

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fixed bug reported by David Gilliam. The answer is not always defined on (0,1). Also minor clean up replacing 2.718... by e. Arnie

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new problems (from an old set that was never added to the CVS) Arnie

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new set (this was an old set that didn't make it into the CVS) Arnie

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removed a linearly dependent case

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Fixed error reported in http://webhost.math.rochester.edu/webworkdocs/discuss/msgReader$1865?mode=topic&y=2003&m=9&d=26 Arnie

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An example showing how to use an answer evaluator as a filter inside another answer evalutor. This process is currently more convoluted than it should be -- hopefully changes, including retrofinishing some old answer evaluators will eventually make it more straight forward. --Mike

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replaced > by > -- it's safer for more browsers.

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Removed an extra parentheses in one of the formulas

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Fixed text so that the question would print properly in math mode. Made minor changes (removing $BD, replacing with \(, using EV3 instead of EV2). There is still more needed in order make this problem model of coding. --Mike

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minor changes

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rewrote using the new display_matrix

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removed repeated problems

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rewrote using new display_matrix

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repeated

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removed repeated problems

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minor changes

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repeated

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minor changes: math mode, displaystyle, left/right brackets...

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repeated

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removed repeated problems

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minor changes: sizes of graphs, displaystyle, math mode, ...

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removed repeated problems

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minor changes: math mode, breaks, displaystyle ...

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added picture instead of a reference to a book

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fixed answers

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added new problems

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made the invertible matrix non-diagonal, and eigenvalues distinct

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new

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updated again Arnie

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comment out voffset Arnie

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updated version Arnie

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new

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back off of Davide's chnages which caused a bug when downloading multiple sets. Arnie

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minor changes

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fixed displaying matrices

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minor changes

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new

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added new problems

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new

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added new problems from 162

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new from 162

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Applied Catalin's bug fix. Arnie

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Added Davide's changes in commented out code. Arnie

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new

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minor modifications: displaystyle, math mode, spaces...

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added new problems

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minor modifications

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new

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minor modifications: displaystyle, math mode, spaces...

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new

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added new problems

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minor modifications: displaystyle, math mode, breaklines, spaces...

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new

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added new problems

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various modifications

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new

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added new problems

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minor modifications: displaystyle, breaklines...

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new

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added a new problem - from Geometry1Points

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merged modifications from Algebra

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minor modifications

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this file says where to look for the problems that used to be in this set

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moved to setAlgebra18FunInverse

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moved to setAlgebra17FunComposition

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moved to setAlgebra19FunTransforms

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problems moved to setAlgebra19FunTransforms

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this file says where to find the problems that used to be in this set

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moved to setAlgebra16FunctionGraphs

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problems from setFunctions1FunctionsGraphs are moved to setAlgebra15Functions and setAlgebra16FunctionGraphs

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problems from setFunctions0Evaluate are moved to setAlgebra15Functions, setAlgebra17FunComposition, and setDiscrete4Functions.

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problems moved to setAlgebra15Functions, setAlgebra16FunctionGraphs, setAlgebra17FunComposition, setAlgebra18FunInverse, and setAlgebra19FunTransforms.

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various modifications

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added new problems from sets Functions* - now all those sets are contained in Algebra*

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new - from Functions*

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added a $BR

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put in a $BR

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this file says where to look for problems that used to live here

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moved to setAlgebra31LogExpApplications

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problems moved to setAlgebra28ExpFunctions, setAlgebra29LogFunctions, setAlgebra30LogExpEqns, setAlgebra31LogExpApplications

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moved to Algebra28ExpFunctions, Algebra29LogFunctions, Algebra30LogExpEqns

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merged modifications in LogExp

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added new problems from LogExp1

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new - from LogExp1

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Explicitly set the paper and screen header files in all setdefinition files so that everything works with WW2 (and also WW1.9) Arnie

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removed misplaced backslash Arnie

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currently sets Geometry1,2,3 are contained in sets Algebra07,14,27. Geometry4 is not contained in Algebra.

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added new problems - from Geometry 2 - relatively new from 140A - now Algebra14 contains Geometry 2

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copied from setGeometry2Lines - relatively new from 140A - Algebra14 contains Geometry2

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minor modification

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removed a test problem

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various modifications

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various modifications

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various modifications

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this was a test

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various modifications

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*** empty log message ***

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*** empty log message ***

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*** empty log message ***

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added some specialized problems

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added a diagonalization problem

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removed a repeated problem

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various changes: made graphs larger, fixed labels, math mode...

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same as ur_fn_2_2.pg

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same as lh2-1_1.pg

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minor modifications

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minor modifications

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minor modifications: math mode, breaklines, displaystyle, ranges of coefficients...

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commented out header files and changed the due date to make all algebra sets ordered

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minor modifications: breaklines, math mode, notes...

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fixed labels, text, and scrambling

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minor modifications: breaklines, math mode...

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minor modifications: uniformized notes, breaklines...

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minor modifications: uniformized notes, breaklines, displaystyle...

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removed repeated problems

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minor modifications

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removed: this problem is identical to sApB_21-26.pg

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removed: this problem was a test. it is identical to sApB_21-26.pg

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minor modifications: uniformized notes, displaystyle, breaklines...

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added new problems from set ComplexNumbers - now Algebra11ComplexNumbers contains ComplexNumbers

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new - from set ComplexNumbers

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merged modifications in the set ComplexNumbers

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minor modifications like breakline, parenthesis, displaystyle...

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added displaystyle, left/right parenthesis, BR...

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minor changes

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added new problems

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new

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fixed one answer

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made show partial correct answers=0: this is a multiple choice question

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minor changes

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reworded

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minor changes

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added a new problem

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new

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changed some series for diversity

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inserted a missing word

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*** empty log message ***

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added new problems

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new

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added new problems

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new

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increased the length of answer rule

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new

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new set

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modified coefficients

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added +C

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broke problems into groups of 5

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removed note

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removed note

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fixed answer

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added new problems

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only the first question from osu_in_14_8.pg

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like osu_in_14_6.pg but without all the steps

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removed note

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made S bold

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fixed a typo

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minor changes

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fixed W

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added BR

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modified ranges of coefficients

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modified ranges of coefficients to avoid 1x and ...+0

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added BR

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added a new problem

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like ur_sr_6_10.pg but added a possible answer

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added explanation about double factorial - from mth143

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corrected due date

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erased deadline

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consists one or more of the following intervals => consists of ...

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now the answer is a function, and the derivative varies

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added a new problem

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corrected answers and simplified code

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new

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added new problems

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changed the order of the problems

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added a new problem

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new

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added a new problem

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new

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added new problems

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new

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added a new problem

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added displaystyle

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added new problems

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new

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added a new problem

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made the graphs bigger

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added displaystyle and BR

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new

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added new problems

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decreased the lengths of the intervals because it was not easy to guess the instantaneous velocity from the average velocities for previous time intervals

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corrected answers

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changed the range of coefficients to make the answer nicer (made stopTime an integer so that it is easier to compute distance)

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changed the format for a to the usual one (so that shows say 2 rather than 2.000000)

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like question without f in the file name, but doesn't ask for f'(number), only f'(x)

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made showPartialCorrectAnswers = 1 instead of 0

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changed the ranges of random numbers so that to avoid 1x and 0x

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removed the note

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made the graph bigger

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added a space

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added displaystyle

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added BR

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added new problems

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new

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added new problems

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new

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added new problems

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modified ranges of random numbers

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added new problems

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minor changes

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new

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added new problems

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added periods

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new

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nothing too important

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added new problems

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added new problems

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new

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added new problems

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added new problems

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nothing important

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added new problems

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corrected a misprint

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new

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added new problems

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modified coefficients

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new

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added break line

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added new problems

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new

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various changes

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added new problems

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various modifications

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added break line

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new

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changed displaying

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replace display_matrix by display_matrix_mm, etc Arnie

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added new problems

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new problem

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corrected spelling

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added a new problem

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rounded (integer) entries to avoid printing 9.999999

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new

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added a new problem

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new

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added a new problem

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added a space

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new

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added new problems

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added a space

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new

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various modifications

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added new problems

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new

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erased math mode inside display_matrix because the set doesn't print out with it

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added a \right . to match \left Arnie

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need to use displat_matrix_mm instead of display_matrix in math mode Arnie

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Fixed TeX error in the problem. With this error, WeBWorK 1.9 will still download hardcopy presumably since it uses batchmode. WeBWorK 2 also used batchmode but hangs on this error. Strange. Arnie

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added new problems

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new

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Replace "^" by "$CARET" to remove TeX error Arnie

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fixed undefined control symbol Bigvert

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slight change Arnie

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Imported sources

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initial version

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added new problems

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added brackets

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new

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update apaper header file Arnie

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various changes

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new

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moved from set ComplexNumbers

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moved to set 2

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moved a problem from setComplexNumbers to setComplexNumbers2AnalyticFunctions

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moved a problem from setComplexNumbers to setComplexNumbers2AnalyticFunctions

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moved from set ComplexNumbers

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moved to set 2

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Missed one. -- Mike

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Removed all of the .pl files from this directory it was too hard to keep them in sync with everything the courseScripts, pglib and macro directories. We'll rethink this once we have a separate module for PG --Mike

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Removing two .pg files that don't belong here. -- Mike

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deleted spaces

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new

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Updating file in foobar

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minor changes

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new

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new problem

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new set

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new problem

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Added code that synchronized the PGchoicemacros.pl files from webwork and webwork2. Most changes were made to the webwork2 version. -- Mike

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Commiting copies of the macro files which are common to both webwork2 and webwork1.8. These are current versions of webwork1.8 files as of June4, 2003. If we develop macro files in this directory the improvements will benefit both webwork1.8 and webwork2 simultaneously. The problem of how to keep the .pm macro files current is still being considered. -- Mike

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rewrote displaying using display_matrix and mbox, fixed keywords

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rewrote displaying using display_matrix and mbox, fixed keywords.

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rewrote displaying using display_matrix and mbox, fixed keywords, and minor changes

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minor changes

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rewrote displaying using display_matrix and mbox, added keywords, and minor changes

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increased size of answer rule

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corrected answer

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simplified problem

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increased size of answer rules

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changed the way weight is chosen

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corrected answer

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made R positive

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increased size of answer rules

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deleted displaying slice

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reworded

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moved from old set 8

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new set

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moved from old set 9

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new set

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new problems

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new sets

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moved from old set 7_5

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moved from old set 7

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moved from old set 6

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new sets

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new sets

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moved from old set 6

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moved from old set 5

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moved from old set 4

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new set

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moved from old set 3

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new set

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moved from old set 3

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moved from old set 3

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new set

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old set

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moved from old set 2

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new sets - from old 2

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moved some problems to set 2

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moved to set 2

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moved from set 1

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new set

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minor modifications

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rewrote displaying using display_matrix and/or mbox, and minor modifications

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fixed keywords, changed definition of matrix a so that it is invertible, made matrix e not equal to cI, made rhs non-zero, rewrote desplaying using mbox

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new problem

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Fixed the size of the graph so that it was easier to read.

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Example of drawing directly on a graph

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new files

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new files

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Changed "x" to "n" in infinite sum

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Fixed it so that it now works with Netscape 7 which converts tags to XML format

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minor change

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add course name to summary

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fix typo

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new version

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old version

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new versions

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new version

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new versions

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Removed old versions

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Florin'd bug fix

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More corrections to documentation

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Updated documentation in conditionalquestionexample.pg

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Mention that the CAPA problem is usually commented out

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more problems I forgot to add

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I hadn't realized that I didn't commit these earlier

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fixed typo

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comment out lines requesting non existent header files

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giving some credit where credit was due ~Liam

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Fixed minor spelling errors reported by John Jones

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definition file for set Complex

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new problmes from mth150

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new problems from mth150

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new problems from math 150

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added new problems

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new generic sample questions

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revised and randomized problems

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new randomized problems from math 150

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new problems from math150

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new problems from math150 CVS---------------------------------------------------------------------

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new problems from math 150

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removed problem

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randomized problems

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added some problems ~Liam

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randomized problems

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randomized problems from mth150

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added documentation

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new and randomized problems from mth150

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new randomized problems from mth150

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new problems from mth150

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various edits, but mostly fixing graphics once again

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randomized problems and fixed set definition file

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removed some problems from Functions to make it's own directory (Algorithms) and changed problem name

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small edits and randomization

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a few formatting changes

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randomized problems

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trying to get 4 unique values

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new problems from mth150

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added new files from mth 150

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added setDiscrete5Algorithms, edited problems in setDiscrete4Functions

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added documentation

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moved some problems to a different directory

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moved to a different directory

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moved problems

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split setFunctions1FunctionsGraphs into two directory...this is new definition file

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edited documentation

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added problems

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fixed graphics for hardcopy

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added problem to this directory

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added problem

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added new problems from discrete math

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fixed graphics for the hard copy

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removed this unknown problem from rochester_problib and put it into correct problem set

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moved the unknown problem setFunctions4 which was just hanging out by it self in rochester_problib to the correct problem set, setFunctions4Inverse

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added new problem

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changed due dates so they were in order and easier to find.

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fixed headers

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reordered and renamed

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*** empty log message ***

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new problem

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added new problem

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changed num_cmp to str_cmp so that binary numbers were evaluated correctly

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changed the standard deviation among other things so that the problem actually works correctly

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added a new problem...actually just very similar to ur_stt_4_9, but this version is from a different textbook

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changed test statistic so that it remains positive so easier calculation of pvalue

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changed wording so it is clearer and changed test statistic so that it stays positive for easier calculations of p values

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changed table so that it works better in the hard copy

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fixed table so that it was better on the hard copy

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fixed cube root symbols

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fixed spacing...why am i so obsessed with spacing?

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small typos and formatting changes

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fixed table, made code understandable

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small typos and formatting

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small typos and formatting

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added venn diagrams for graphics

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removed blank problems

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small typos

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changed date to 2002

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small typos and fixed bugs

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discrete function problems

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I accidentally had repeated some of the problems in the list, this is now corrected

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created a new directory for discrete function problems

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added some problems

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initial verions of problems involving complex numbers

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changed due dates so that they are in order

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new problems

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new problems

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added new problems for Discrete and edited in SetTheory

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Importing 8th grade problems

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added demonstration comment

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initial checkin

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fixed answers

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added new problem

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made tolerance 0.0005

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fixed the answer and added one question

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various corrections

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*** empty log message ***

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fixed **

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added new problems

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mostly modified the range of coefficients to avoid 1x

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fixed left endpoint

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*** empty log message ***

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new

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added new problems

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removed unnecessary axis in sc6_2_3.pg; two new problems

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added a new problem

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various corrections, one new

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removed unnecessary mbox

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new

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fixed raising to a power (**)

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fixed errors

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corrected bug pointed out by Carl

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new problems from mth140a

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new problem from mth140a

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new problems from mth140a

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new problems from mth140a

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new problems from mth140a

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new problems from mth140a

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new problems from mth140a

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new problems from MTH 140a

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new problem from mth140a

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added new problems from mth140a

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fixed the range of c = probability of A given B

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*** empty log message ***

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now use strings option in num_cmp rather than str_cmp or num_cmp without strings option. Fixes a bug pointed out by David Johnson

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added new problem

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new problems from mth140a

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fixed an error

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n=7, not 8

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fixed the answer

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new problems from MTH 140A

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added new problems

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*** empty log message ***

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*** empty log message ***

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new problems

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*** empty log message ***

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added new problems from MTH140A

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new and revised problems from MTH140A

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added new problem

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new problems

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new problem

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*** empty log message ***

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*** empty log message ***

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*** empty log message ***

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made the graph bigger

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new problem

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*** empty log message ***

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Removed obsolete instructions stating that num_cmp MUST output to a list. This is no longer true. It can output to either a list or to a single variable. This is also true of all other answer evaluators created using the AnswerEvaluator package defined in AnswerHash.pm

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fixed up hint

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fixed typo

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added s2_7_13.pg

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initial version

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fixed the limit for arccos

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added solutions

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initial revision

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added problems with solutions

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initial revision

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removed -there are no problems on this topic

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removed 18_6 - identical to 18_5

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set showPartialCorrectAnswers=0

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Mike fixed typo in formula

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usu std_num_str_cmp

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use std_num_str_cmp

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Updated the standardexample.pg file, which was in fact a backup file (.pg.bak) -- only the first of the early changes was being displayed.

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this problem now references its images correctly. Make sure the permissions on the parent directory htmllinksexample allows execution so that the webserver can reach the .gif file.

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The conditionalquestion example.pg now behaves correctly when the answer is blank. The htmlexample.pg prob5.pg are buggy versions of other problems and have been removed.

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This file was a (buggy) duplicate of vectorfieldexample.pg It is being removed.

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the same as ur_in_18_5.pg

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erased an extra bracket

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i think it is fixed now

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changed the due date

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replaced rel by reltol, but there is something else wrong with this problem, which I don't know how to fix. It complains about PGtranslator.pm::process_answers.

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fixed the order of the defined variables

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fixed num_cmp

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fixed num_cmp and parentheses

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fixed typos

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Fixed call to answer evaluators (which are now AnswerEvaluator objects rather than CODE)

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Updated the call to level_curve_check to include option keys.

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Fixed some hand crafted answer evaluators which assumed that the standard answer evaluators were CODE instead of AnswerEvaluator objects

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fixed the number of pairs

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removed

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fixed misprints

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I don't know what exactly was wrong. I changed several things, and it works now.

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fixed num_cmp

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fixed parentheses

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changed &ANS(function_cmp... to ANS(fun_cmp...

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removed: there is such a problem under another name

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removed quotes from around numerical answer

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Unneeded -- renamed to webwork/system/courseScripts/PGdiffeqmacros.pl a while ago.

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moved to webwork/system/courseScripts

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re-added these files.

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forgot to erase a test

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replaced shading with parallel lines by fillRegion

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removed files that were inadvertantly added to CVS

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commented out a problem - it doesn't work

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fixed cos

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*** empty log message ***

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uncommented 2_3 which works now

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changed num_cmp to std_num_cmp

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slightly modified

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many modifications: made the coefficients integer, simplified code by choosing x and y first, defined the determinant "by hand" - so that it works now.

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removing unneeded backup files

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changed answermacros2 to diffeqmacros

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changed numericalmethods to PGnumericalmacros

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rounded the value of the last probability

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removing from this directory

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removed from this directory

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removed files from this directory

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removed from this directory

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*** empty log message ***

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new problems

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new set definition file

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each variable has its own interval now.

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changed 1999 to 2001

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added new problems

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new problems

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mostly new problems, except for ur_pb_16_2.pg and ur_pb_16_10.pg are moved here from set Probability13

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new set definition file

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new problems

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added new problems and fixed order so that they were organized by intro, large sample, small sample, population proportion, and variance

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removed 2 problems - will move to another set

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moved to another set

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new problems

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new set definition file

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new problems

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new set definition file

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added new problem

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new problem

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Changed URL for accepted functions link.

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fixed typos

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added new problems

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new problems

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fixed errors and made changed to order in set def file

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added new problems

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new problems

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added new problems

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new problems

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added new problems

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new problems

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added new problems

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new problem

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new problems

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added new problem and changed order

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new problem

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fixed spacing

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added new problems

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new problems

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new problems

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added new problems

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fixed parenthesis

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added new problem

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new problem

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fixed tolerance and some other things

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changed the order of the problems

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added new problems

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new problems

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fixed arrays

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added new problems

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new problems

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nothing important

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added new problems

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modified coefficients

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new problems

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changed size of table

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new problems

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added new problems

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new problems

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fixed typos

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added new problems

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new problems

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new problem

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new problem

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changed small sample to large sample

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new problems

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changed set def file so that order of problems is different

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fixed typos

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changed the size of the table

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*** empty log message ***

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modified table

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new problems

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added new problems

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new problems

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modified the table so that it fits into a column

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new problems

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fixed some errors in confidence interval section

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various corrections and modifications

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added new problems

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new set definition file

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added more problems

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new set definition file

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new problems

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new problems

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fixed typos and spacing

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added new problems

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new set definition file

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new problem

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new problems

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added new problems

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fixed the degree of freedom

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new problems

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added a problem

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new set definition file

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new problems

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fixing percent signs

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new problems

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edited problem to be more consistant

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edited problem, added more variety

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new set definition file

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added a problem

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new problems

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added a problem

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added problems

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edited definition file by removing problems that are not needed

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changed due date

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adding new problem set

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new set definition file

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changed the due date

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fixed errors and spacing

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fixed spaces

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added problem library as webwork/ww_prob_lib with revision tag prob-lib-2

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