Updates:
Summary: make sign simplification part of canonicalizing process
Labels: Simplify Matching
Comment #4 on issue 1993 by smi...@gmail.com: make sign simplification part
of canonicalizing process
http://code.google.com/p/sympy/issues/detail?id=1993
Here is another place where stable, alternate representations give
different results:
n=t
d=t-1
(n/d).subs(t,1)
oo
(-n/-d).subs(t,1)
-oo
n/d == -n/-d, n/d, -n/-d
(False, t/(t - 1), -t/(-t + 1))
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