2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/100883We obtain a characterization of property (T) for von Neumann algebras in terms of 1-cohomology similar to the Delorme-Guichardet Theorem for groups.Final versionOperator Algebras46L10, 46L57, 22D25A 1-cohomology characterization of property (T) in von Neumann algebrastext