Comment #24 on issue 565 by jochen.voss: integrate does not ommit null
terms and simplify fails to handle them afterwards.
http://code.google.com/p/sympy/issues/detail?id=565
I think the problem described in #23 is gone, now.
The following looks good to me:
v...@couscous [~/sympy] SYMPY_USE_CACHE=no ./bin/isympy
Python 2.5.2 console for SymPy 0.6.5-git (cache: off)
These commands were executed:
>>> from __future__ import division
>>> from sympy import *
>>> x, y, z = symbols('xyz')
>>> k, m, n = symbols('kmn', integer=True)
>>> f, g, h = map(Function, 'fgh')
Documentation can be found at http://sympy.org/
In [1]: integrate(-1./2 * x * sin(n * pi * x/2), [x, -2, 0])
Out[1]:
2⋅cos(π⋅n)
──────────
π⋅n
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