2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47816We consider the emission or absorption of $n$ identical bosons from an energetic or a massive particle, in which the bosons and the source particle are allowed to be offshell. The Bose-Einstein symmetrized amplitude can be decomposed into sums and products of more elementary objects which we choose to call `atoms'. The origin of this decomposition, its significance and some of its applications will be summarized.16 pages with 1 postscript figure composed in the Revtex preprint format. Contribution to the volume `Ta-You Wu and Physics' in honour of Dr. T.-Y. Wu's ninetieth birthdayHigh Energy Physics - Phenomenologytext