2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93409Hypersensitivity to perturbation is a criterion for chaos based on the question of how much information about a perturbing environment is needed to keep the entropy of a Hamiltonian system from increasing. In this paper we give a brief overview of our work on hypersensitivity to perturbation in classical and quantum systems.14 pages, LaTeX, 1 figureQuantum Physicstext