2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/223549This is a write-up of a talk for non-specialists on the treatment of angular momentum for radiating systems resolving the supertranslation problem.17 pages, 1 figure, talk at WCNA 2008, to appear in Journal of Nonlinear AnalysisGeneral Relativity and Quantum Cosmologytext