2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/162087Analogues of multi-paramter multiplier operators on R^d are defined on the torus T^d. It is shown that these operators satisfy the classical Coifman-Meyer theorem. In addition, L log L and L (log L)^n end-point estimates are proved.This is the author's dissertation from Cornell University. 141 pages, 0 figuresClassical Analysis and ODEstext