The evaluation of Tornheim double sums. Part2
Number Theory
2008-11-05 v1 Classical Analysis and ODEs
Abstract
We provide an explicit formula for the Tornheim double series T(a,0,c) in terms of an integral involving the Hurwitz zeta function. For integer values of the parameters, a=m, c=n, we show that in the most interesting case of even weight N:=m+n the Tornheim sum T(m,0,n) can be expressed in terms of zeta values and the family of integrals % \int_0^1 loggamma(q) B_{k}(q) Cl_{j+1} (2 \pi q) dq, % with k+j = N, where B_{k}(q) is a Bernoulli polynomial and \Cl_{j+1}(x) is a Clausen function.
Keywords
Cite
@article{arxiv.0811.0557,
title = {The evaluation of Tornheim double sums. Part2},
author = {Olivier Espinosa and Victor H. Moll},
journal= {arXiv preprint arXiv:0811.0557},
year = {2008}
}
Comments
38 pages, AMSLaTeX; submitted to Journal of Number Theory. "Tornheim.m", a Mathematica 6.0 package to work with Tornheim sums, is available for download from http://www.math.tulane.edu/~vhm/packages.html