ContextLimitedPolynomial

checkPolynomial Category: MathObject
Status	Standard
Description	Allow only entry of polynomials
File Name	contextLimitedPolynomial.pl
File Path	/pg/macros/contextLimitedPolynomial.pl
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Code Docs	http://webwork.maa.org/doc/cvs/pg_HEAD/macros/contextLimitedPolynomial.pl.html
NPL Example
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Purpose of this Macro

In the LimitedPolynomial context, WeBWorK will require all student answers to be (expanded) polynomials (i.e., sums of multiples of powers of x). This context allows also requiring that there be only one term with each power of x. The checkPolynomial macro…

Initialization

Enable the LimitedPolynomial context in loadMacros:

loadMacros(
  "MathObjects.pl",
  "contextLimitedPolynomial.pl",
  others,
);

Select the context using:

Context("LimitedPolynomial");

If you set the ``singlePowers flag, then only one monomial of each degree can be included in the polynomial:

Context("LimitedPolynomial")->flags->set(singlePowers=>1);

There is also a strict limited context that does not allow operations even within the coefficients. Select it using:

Context("LimitedPolynomial-Strict");

In addition to disallowing operations within the coefficients, this context does not reduce constant operations (since they are not allowed), and sets the singlePowers flag automatically. In addition, it disables all the functions, though they can be re-enabled, if needed.

Usage

The checkPolynomial macro is used as follows…

See Also

• Specialized contexts
• DisableFunctions
• ModifyingContexts(Advanced)