Bulletin of the
Korean Mathematical Society
BKMS

ISSN(Print) 1015-8634 ISSN(Online) 2234-3016

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Bull. Korean Math. Soc. 2013; 50(4): 1389-1413

Printed July 1, 2013

https://doi.org/10.4134/BKMS.2013.50.4.1389

Copyright © The Korean Mathematical Society.

Convolution sums and their relations to Eisenstein series

Daeyeoul Kim, Aeran Kim, and Ayyadurai Sankaranarayanan

National Institute for Mathematical Sciences, Chonbuk National University, Tata Institute of Fundamental Research

Abstract

In this paper, we consider several convolution sums, namely, $\mathcal{A}_i(m,n;$ $N)$ $(i=1, 2, 3, 4)$, $\mathcal{B}_j(m,n;N)$ $(j=1, 2, 3)$, and $\mathcal{C}_k(m,n;N)$ $(k=1, 2, 3, \ldots$, $12)$, and establish certain identities involving their finite products. Then we extend these types of product convolution identities to products involving Faulhaber sums. As an application, an identity involving the Weierstrass $\wp$-function, its derivative and certain linear combination of Eisenstein series is established.

Keywords: sum of divisor functions, convolution sums, Faulhaber sums, Eisenstein series, elliptic function

MSC numbers: Primary 33E05, 11A25, 11B65; Secondary 11Y35, 11Y70