Comment #5 on issue 1696 by asmeu...@gmail.com: integral of heaviside
http://code.google.com/p/sympy/issues/detail?id=1696
I bisected the fix to
commit 65f483e40306f186537e8d9eb0fff3029b40ac61
Author: Chris Smith <smi...@gmail.com>
Date: Sun Nov 13 09:59:04 2011 +0545
evalf: 1->1.0; no expand or conjugate with symbolic expressions
Expanding a Mul or Power makes sense when dealing with numeric
expressions, e.g. (1 + I)**2, but need not be done for symbolic
expressions. The same applies for the use of conjugate to deal
with expressions like 1/(1 + I).
Also, +/-1 were not being processed but they are now. The only
caveat is that the negative 1 on an expression like -x is not
changed to 1.0.
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