Status: Valid
Owner: ----
CC: smi...@gmail.com
Labels: Type-Defect Priority-Medium Simplify
New issue 3953 by julien.r...@gmail.com: simplify returns a complicated
factored form instead of a simpler result
http://code.google.com/p/sympy/issues/detail?id=3953
Given the code snippet:
from sympy import S, simplify, symbols
w, x, y, z = symbols('w x y z')
q = -2*x*y*(z/2 - S(1)/2) + z + z/w
simplify(q)
This used to simplify to
-x*y*(z - 1) + z + z/w
but now it simplifies to
(w*(-x*y*(z - 1) + z) + z)/w
which looks more complicated to me.
Bisect leads me to commit 3305c73b265691be4a411971cdbbd8e39e8810ca
Author: Chris Smith <smi...@gmail.com>
Date: Wed Mar 27 22:41:50 2013 +0545
modifications to simplify
== add quick exit for simplify if expr is Atom
== 3712: try return factored expression more often
== 3730: use as_content_primitive and cancel
from https://github.com/sympy/sympy/pull/1925
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