2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/78232We prove some results which extend the classical theory, due to Hecke-Schoeneberg, of the transformation laws of theta functions. Although our results are classical in natural, they were suggested by recent work involving modular-invariance in conformal field theory.13 pages, LatexQuantum Algebratext