Comment #4 on issue 1168 by [email protected]: Matrix([[x+y, -x, 0], [-x-y, x, 1], [0,1,0]]).inf() gives wrong result
http://code.google.com/p/sympy/issues/detail?id=1168
This is more of a simplify problem, than a matrices problem. The LU and GE methods aren't as symbolically stable as ADJ.
I think, ADJ should be made default method. I'll put that in my cholesky branch, if we all agree.
Another thing, shouldn't the applyfunc(simplify) be done implicitly when returning inv() or det() etc.
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