2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/62621We present a new, completely three-dimensional proof of the fact, due to Gabai-Eliashberg-Thurston, that every closed, oriented, irreducible 3-manifold with nonzero second homology carries a universally tight contact structure.10 pages, 1 figureGeometric Topologytext