English

Dirichlet series of Rankin-Cohen Brackets

Number Theory 2010-09-01 v1

Abstract

Given modular forms ff and gg of weights kk and \ell, respectively, their Rankin-Cohen bracket [f,g]n(k,)[f,g]^{(k, \ell)}_n corresponding to a nonnegative integer nn is a modular form of weight k++2nk +\ell +2n, and it is given as a linear combination of the products of the form f(r)g(nr)f^{(r)} g^{(n-r)} for 0rn0 \leq r \leq n. We use a correspondence between quasimodular forms and sequences of modular forms to express the Dirichlet series of a product of derivatives of modular forms as a linear combination of the Dirichlet series of Rankin-Cohen brackets.

Keywords

Cite

@article{arxiv.1008.5184,
  title  = {Dirichlet series of Rankin-Cohen Brackets},
  author = {YongJu Choie and Min Ho Lee},
  journal= {arXiv preprint arXiv:1008.5184},
  year   = {2010}
}