Comment #13 on issue 2022 by julien.rioux: inconsistent behaviour of subs
when using non-commutative symbols
http://code.google.com/p/sympy/issues/detail?id=2022
Here's a patch for the git master which fixes the issues from comment #3.
By the way I agree that something like (a*(a+b)*a) should be explicitly
expanded by the user before doing .subs(a*a*a,c) otherwise nothing gets
substituted. This patch does not change this behavior.
Attachments:
2022.patch1 567 bytes
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