Comment #3 on issue 2555 by [email protected]: Wrong result from residue
http://code.google.com/p/sympy/issues/detail?id=2555
If it can not find the (correct!) answer, we have basically two options:
- i) return an unevaluated object representing the original problem
- ii) raise an exception, in case of lacking functionality a
NotImplementedException
In general I would prefer i) but for a system still under
heavy development ii) is probably better for the cases where it applies.
By the way, this should be done more consequently for example
gosper_sum just returns nothing if it failes!
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