Dirichlet series of Rankin-Cohen Brackets

Abstract

Given modular forms $f$ and $g$ of weights $k$ and $\ell$, respectively, their Rankin-Cohen bracket $[f,g{]}_n^{(k,\ell )}$ corresponding to a nonnegative integer $n$ is a modular form of weight $k+\ell +2n$, and it is given as a linear combination of the products of the form $f^{(r)}{g}^{(n-r)}$ for $0\le r\le n$. 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.

References in corpus (1)

• Orbitwise countings in H(2) and quasimodular forms