2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/147440Violation of (semi)-detailed balance conditions in lattice gas automata gives rise to unstable spatial fluctuations that lead to phase separation and pattern formation in spinodal decomposition, unstable propagating modes, driven diffusive systems and unstable uniform flows.15 pages, uuencoded tar-compressed file (139 kb), containing Latex file and 5 encapsulated PostScript figuresCellular Automata and Lattice GasesPattern Formation and SolitonsInstabilities and Patterns (minor technical modifications)text