2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/71969In this article, we extend a multiplicity estimate of Nesterenko, valid for quasi-modular forms associated to $\SL_2(\ZZ)$, to non-holomorphic quasi-modular forms associated to certain co-compact Riemann-Schwarz triangular subgroups of $\SL_2(\CC)$.Number Theory11J99, 12H99text