2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/112644We discuss gluing of objects and gluing of morphisms in tensor triangulated categories. We illustrate the results by producing, among other things, a Mayer-Vietoris exact sequence involving Picard groups.20 pages, added missing bibliographyAlgebraic GeometryCategory TheoryRepresentation Theory18E30; 20C20text