2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/147635We established existence of periodic Reeb orbits for a large class of tight contact structures on closed 3-manifolds, notably the Stein fillable structures, based on a fundamental theorem of Cliff Taubes on symplectic 4-manifolds.Final version with refined statements. 12 pages, 4 figures. To appear Comm. Ana. Geom. Vol. 8, no.1 (2000), 115-131Differential Geometrytext