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Revision 2594


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Author: dpvc
Date: Thu Aug 12 20:17:18 2004 UTC (15 years, 3 months ago)
Log Message:
Fixes for handling intervals better.  In particular, deal better with
ambiguous situations, like (1,2) that could be a point.

You can use [a,a] to specify the single point a.  I'd like to make {a}
represent this (and maybe even {a,b,c} to form finite sets), but this
would interfere with the use of { and } as alternative parentheses.
(Does anyone really use these?)

Do we need a cross product for intervals (and sets) as a means of
representing regions in R^2 (or higher)?

Changed paths:

Path Details
Directorytrunk/pg/lib/Parser/BOP/union.pm modified , text changed
Directorytrunk/pg/lib/Parser/Context/Default.pm modified , text changed
Directorytrunk/pg/lib/Parser/List.pm modified , text changed
Directorytrunk/pg/lib/Parser/Value.pm modified , text changed
Directorytrunk/pg/lib/Value/AnswerChecker.pm modified , text changed
Directorytrunk/pg/lib/Value/Interval.pm modified , text changed
Directorytrunk/pg/lib/Value/Union.pm modified , text changed

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