2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/69224We extend Dolgopyat's bounds on iterated transfer operators to suspensions of interval maps with infinitely many intervals of monotonicity.Dynamical Systems37C30; 37D50; 37E35Exponential decay of correlations for surface semi-flows without finite Markov partitionstext