Comment #10 on issue 3742 by [email protected]: rref very slow
http://code.google.com/p/sympy/issues/detail?id=3742
I am still having problems with rref. I am now using Mateusz's branch. I
have looked at his solve_lin_sys, and saw how he calls rref. When his
solver calls rref, it uses simplify=False, which is why it runs so fast. If
I use Mateusz's rref with simplify=True, it is still incredibly slow or not
finishing at all. I need to use simplify=True, otherwise the rank will not
properly be computed. I generate 11,440 matrices, and 37 of their ranks are
not properly computed when simplify=False. His solver is correct and fast
because his matrix doesn't have to be put in completely rref to solve the
system of equations, but to properly compute the rank of a matrix it must
be as reduced as possible i.e. simplify=True.
Your help is greatly appreciated!
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