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Comment #8 on issue 1475 by asmeurer: New implementation of .eval in
trigonometric functions, implementing sec, csc
http://code.google.com/p/sympy/issues/detail?id=1475
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Comment #4 on issue 2555 by asmeurer: Wrong result from residue
http://code.google.com/p/sympy/issues/detail?id=2555
residue() also is wrong for expressions that behave a little nicer than
this. For example:
In [36]: expr = exp(z)/(z - pi*I/4*a)**n
In [37]: residue(expr, z, I*pi*a/4)
Comment #5 on issue 2555 by asmeurer: Wrong result from residue
http://code.google.com/p/sympy/issues/detail?id=2555
Actually, perhaps it could always infer this from the series. In the case
of exp(1/z), the series is just exp(1/z) (this could perhaps be considered
a bug in series()). For