Comment #4 on issue 2395 by [email protected]: Factorial simplification
http://code.google.com/p/sympy/issues/detail?id=2395
With the git version I got a similar issue:
(factorial(n)/n).simplify()
n!/n does not simplify, while I expect to obtain just (n-1)! but at the same time:
(gamma(n+1)/n).simplify()
gamma(n) so the simplify do the right thing in some cases. in a similar fashion, I expect
(factorial(n)/factorial(n-k)).simplify()
to return a falling factorial ff(n,k), but again it doesn't simplify and sympy see the two expressions as different
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