Status: Accepted
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 2909 by [email protected]: gosper_sum dosctring needs editing
http://code.google.com/p/sympy/issues/detail?id=2909
I find the gosper_sum dosctring to be very confusing with subscript and
function notation, e.g. g(0), g_{n+1}, and find the description of the
result hard to interpret in light of the following example (which should
probably be included there to help make things clear):
>>> fk = (4*k + 1)*factorial(k)/factorial(2*k + 1)
>>> sn = gosper_sum(fk, (k, 0, n))
>>> s012 = sum(fk.subs(k,i) for i in [0,1,2])
>>> sn.subs(n, 2).equals(s012)
True
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