Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 1564 by Soukhinov: Cannot sum expression with factorial
http://code.google.com/p/sympy/issues/detail?id=1564
Sympy gives me the following:
>>> from sympy import *
>>> sympify("sum(x*factorial(x),(x,1,n))")
Sum(x*gamma(1 + x), (x, 1, n))
But AlgebraFX 2.0 calculator gives correct answer:
N!+N*N!-1
:(
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