Comment #1 on issue 3565 by [email protected]: Sum(x**n, (n, 0, oo)).doit() is wrong
http://code.google.com/p/sympy/issues/detail?id=3565

Hi,

I'm new to this open-source development sort of thing, and I've been looking at this for the past few hours. The documentation is a bit fuzzy and I'm not too familiar with algorithms being used... are there good references anyone could point me to for some background reading?

Thanks,

Desmond Foo

P.S. I tried adding a simple if (not a.has(S.Infinity, S.NegativeInfinity) and not b.has(S.Infinity, S.NegativeInfinity))) clause before using the summation formula with the c1, c2, and c3's but it broke one of the tests. I figured I should learn more about this stuff before trying something else.

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