2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/69331The summatory function of $t_j(n^2)$ is estimated, where $H_j(s) = \sum_{n=1}^\infty t_j(n)n^{-s}$ is the Hecke series of a non-holomorphic cusp form. The analogous problem of holomorphic cusp forms is also treated.5 pagesNumber Theory11F72; 11M06text