Can anyone tell me what is Polylog? I am trying to integrate the
(x/(exp((x-a)+1)) form 0 to infinity.. and I am getting an answer which has the form as -(polylog(2,a)).
What is this? Actually a is number that has other constant terms in it .. so I can not substitute it with a numeric value... else my life would have been easier.. and the Mathematica Help section does not refer to it in detail ..
Any help would be sincerely appreciated.