2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/74269Given a new definition for the entropy of a cellular automata acting on a two-dimensional space, we propose an inequality between the entropy of the shift on a two-dimensional lattice and some angular analog of Lyapunov exponents.20 Fevrier 2005Dynamical Systems37B15,37A35,37A25text