Elsevier

Journal of Number Theory

Volume 170, January 2017, Pages 191-210
Journal of Number Theory

Higher Hickerson formula

https://doi.org/10.1016/j.jnt.2016.06.003Get rights and content
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Abstract

In [11], Hickerson made an explicit formula for Dedekind sums s(p,q) in terms of the continued fraction of p/q. We develop analogous formula for generalized Dedekind sums si,j(p,q) defined in association with the xiyj-coefficient of the Todd power series of the lattice cone in R2 generated by (1,0) and (p,q). The formula generalizes Hickerson's original one and reduces to Hickerson's for i=j=1. In the formula, generalized Dedekind sums are divided into two parts: the integral sijI(p,q) and the fractional sijR(p,q). We apply the formula to Siegel's formula for partial zeta values at a negative integer and obtain a new expression which involves only sijI(p,q) the integral part of generalized Dedekind sums. This formula directly generalizes Meyer's formula for the special value at 0. Using our formula, we present the table of the partial zeta value at s=1 and −2 in more explicit form. Finally, we present another application on the equidistribution property of the fractional parts of the graph (pq,Ri+jqi+j2sij(p,q)) for a certain integer Ri+j depending on i+j.

Keywords

Generalized Dedekind sums
Siegel's formula
Meyer's formula
Partial zeta function
Real quadratic fields

Cited by (0)

1

J.L. was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2011-0023688) and (NRF-2009-0093827).

2

B.J. was supported by NRF-2015R1D1A1A09059083.

3

H.C. was supported by 2014 Hongik University Research Fund.