Updates:
Cc: ronan.l...@gmail.com
Labels: Assumptions
Comment #2 on issue 2416 by asmeurer: Exponential function exp(I*k**2*pi)
simplifies to -1
http://code.google.com/p/sympy/issues/detail?id=2416
It's because of
In [15]: k = Symbol('k', integer=True)
In [16]: (k**2).is_even
Out[16]: False
In [17]: (k**2).is_odd
Out[17]: True
I'd check the new assumptions, but I don't even know how the syntax works
there nowadays.
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