openwebwork/pg — pull request #94 by dpvc (2014-01-31 17:05:18+00:00)
Title: Patch MathObjects

This fixes some MathObject issues:

* Prevents Matrixes from passing on cached MatrixReal1 objects (that are used for inverses, and so on). (See this [forum post](http://webwork.maa.org/moodle/mod/forum/discuss.php?d=3162).)

* Fixes a problem with undefined values in FormulaUpToConstant. (See this [forum post](http://webwork.maa.org/moodle/mod/forum/discuss.php?d=3226).)