2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/63142We prove that any real-analytic, volume-preserving action of a lattice $Γ$ in a simple Lie group with $\Qrank(Γ)\geq 7$ on a closed 4-manifold of nonzero Euler characteristic factors through a finite group action.5 pagesDifferential GeometryDynamical Systemstext