Re: [Reduce-algebra-developers] expansion of gamma function

[Andrey G. G. <A.G...@in...>]

On Wed, 14 Oct 2015, Rainer Schöpf wrote:
> However, it means that gamma, psi and friends must be treated specially.
Yes. But other systems (maxima, mathematica, ...) can expand gamma, while 
reduce cannot :-(

> In addition, the above formula doesn't help for the expandsion of gamma(f(x))
> where f(x) is some non-trivial, but well known function, like gamma(x^2-x^3) .
For any f(x) such that f(0) is integer it does. First reduce gamma(f(x)) 
to gamma(f(x)+n) where n is integer and f(0)+n=1, then use the above 
formula. In particular, for your example x^2-x^3 this works fine.

It does not help if f(0) is not integer.

Andrey