2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/120712Global time estimates of Lp-Lq norms of solutions to general strictly hyperbolic partial differential equations are considered. The case of special interest in this paper are equations exhibiting the dissipative behaviour. Results are applied to discuss time decay estimates for Fokker-Planck equations and for wave type equations with negative mass.Journees "Equations aux Derivees Partielles"Analysis of PDEsFunctional Analysis35A20; 35S30; 58G15; 32D20text