2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/137030A recollement describes one triangulated category T as "glued together" from two others, S and U. The definition is not symmetrical in S and U, but this note shows how S and U can be interchanged when T has a Serre functor.5 pagesRepresentation Theory18E30text