English

A new Ramanujan-type identity for $L(2k+1,\chi_1)$

Number Theory 2021-12-20 v1

Abstract

One of the celebrated formulas of Ramanujan is about odd zeta values, which has been studied by many mathematicians over the years. A notable extension was given by Grosswald in 1972. Following Ramanujan's idea, we rediscovered a Ramanujan-type identity for ζ(2k+1)\zeta(2k+1) that was first established by Malurkar and later by Berndt using different techniques. In the current paper, we extend the aforementioned identity of Malurkar and Berndt to derive a new Ramanujan-type identity for L(2k+1,χ1)L(2k+1, \chi_1), where χ1\chi_1 is the principal character modulo prime pp. In the process, we encounter a new family of Ramanujan-type polynomials and we notice that a particular case of these polynomials has been studied by Lal\'{i}n and Rogers in 2013. Furthermore, we establish a character analogue of Grosswald's identity and a few more interesting results inspired from the work of Gun, Murty and Rath.

Keywords

Cite

@article{arxiv.2112.09322,
  title  = {A new Ramanujan-type identity for $L(2k+1,\chi_1)$},
  author = {Shashi Chourasiya and Md Kashif Jamal and Bibekananda Maji},
  journal= {arXiv preprint arXiv:2112.09322},
  year   = {2021}
}

Comments

22 pages, 2 tables