Self-approximation of Dirichlet L-functions

Details Self-approximation of Dirichlet L-functions Self-approximation of Dirichlet L-functions

2010-06-08

arxiv.org/abs/1006.1507v3

Mathematics

Number Theory

11 pages, added Theorem 2

Scientific paper

Let $d$ be a real number, let $s$ be in a fixed compact set of the strip $1/2<\sigma<1$, and let $L(s, \chi)$ be the Dirichlet $L$-function. The hypothesis is that for any real number $d$ there exist 'many' real numbers $\tau$ such that the shifts $L(s+i\tau, \chi)$ and $L(s+id\tau, \chi)$ are 'near' each other. If $d$ is an algebraic irrational number then this was obtained by T. Nakamura. \L. Pa\'nkowski solved the case then $d$ is a transcendental number. We prove the case then $d\ne0$ is a rational number. If $d=0$ then by B. Bagchi we know that the above hypothesis is equivalent to the Riemann hypothesis for the given Dirichlet $L$-function. We also consider a more general version of the above problem.

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