2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/148876The general solutin to the constraints that define relativistic spin networks vertices is given and their relations with 3-dimensional quantum tetrahedra is dicussed. An alternative way to handle the constraints is also presented.3 pages, LaTeX, previous results clarified, new statements madeGeneral Relativity and Quantum Cosmologytext