Special values of derivatives of $L$-series and generalized Stieltjes constants

Abstract

The connection between derivatives of $L(s,f)$ for periodic arithmetical functions $f$ at $s=1$ and generalized Stieltjes constants has been noted earlier. In this paper, we utilize this link to throw light on the arithmetic nature of $L^{\prime }(1,f)$ and certain Stieltjes constants. In particular, if $p$ is an odd prime greater than $7$, then we deduce the transcendence of at least $(p-7)/2$ of the generalized Stieltjes constants, $\{{\gamma }_1(a,p):1\le a<p\}$, conditional on a conjecture of S. Gun, M. R. Murty and P. Rath.

11 pages