Re: Ask for help to evaluate an equation

*To*: mathgroup at smc.vnet.net*Subject*: [mg129119] Re: Ask for help to evaluate an equation*From*: Oliver Jennrich <oliver.jennrich at gmx.net>*Date*: Mon, 17 Dec 2012 02:53:03 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*References*: <kajod8$ilr$1@smc.vnet.net>

Hugo <hpe650820 at gmail.com> writes: > I want to evaluate the following equation with mathematica but it seems i'm doing something wrong. > > Sum[(-1)^n/A^(n+1)t^(1+n-k(1-eta))beta^(n-k) Binomial[n,k](alpha Gamma[1-eta])^k/Gamma[2+n-k(1-eta)],{n,0,Infinity},{k,0,Infinity}] > > Any help would be appreciate it What do you man with "doing something wrong"? The expression is syntactically correct, so I assume you mean that Mathematica doesn't give you the expected result or no result at all. The inner term can not be successfully summed by Mathematica 9 when the sum is just extended over the k - so I assume trying to sum over both n and k doesn't result either in a closed form... -- Space - The final frontier