Mean Values of a Gcd-Sum Function Over Regular Integers Modulo n
Deyu Zhang and Wenguang Zhai
School of Mathematical Sciences
Shandong Normal University
P. R. China
In this paper we study the mean value of a gcd-sum function over
regular integers modulo n. In particular, we improve the previous
result under the Riemann hypothesis (RH). We also study the short
interval problem for it without assuming RH.
Full version: pdf,
(Concerned with sequences
Received January 7 2010;
revised version received April 15 2010.
Published in Journal of Integer Sequences, April 15 2010.
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