*To*: mathgroup@smc.vnet.net*Subject*: [mg12010] definite integral bug (3.0)*From*: Richard Easther <easther@het.brown.edu>*Date*: Fri, 17 Apr 1998 03:40:45 -0400*Organization*: High Energy Theory Group, Physics Dept, Brown University

Hi - I recently tried to persuade Mathematica to do the following definite integral, Integrate[ Exp[-x^2] 1/(1 + Exp[ x]),{x,0,Infinity}] and it gives the answer Log[x] 1 + Log[x] PolyGamma[0, 1 + ------] - PolyGamma[0, ----------] 2 2 --------------------------------------------------- 2 which depends on x, so presumably something is wrong here! I am assuming this is a bug - has anyone else seen it? Does it show up in later versions of the kernel than 3.0? Richard