2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/114253We prove the existence and smoothness of density for the solution of a hyperbolic SPDE with free term coefficients depending on time, under hypoelliptic non degeneracy conditions. The result extends those proved in Cattiaux and Mesnager, PTRF 2002, to an infinite dimensional setting.15 pagesProbabilityAnalysis of PDEs60H07, 60H15, 60G60text