2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/125273In nonequilibrium thermodynamics macroscopic entropy creation plays an important role. Here we study, from various viewpoints, its relation with the phase space contraction, which has been recently proposed as an apparently alternative quantity. quantity.10 pages, 1 figure, latex revtexStatistical Mechanicstext