2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/127049Two ideas for the choice of an adequate set of coarse variables allowing approximate autonomous dynamics for practical applications are presented. The coarse variables are meant to represent averaged behavior of a fine-scale autonomous dynamics.To appear in International Journal for Multiscale Computational EngineeringChaotic DynamicsDynamical Systemstext