https://hal-ens-lyon.archives-ouvertes.fr/ensl-00768825Vaugon, AnneAnneVaugonUMPA-ENSL - Unité de Mathématiques Pures et Appliquées - ENS Lyon - École normale supérieure - Lyon - CNRS - Centre National de la Recherche ScientifiqueReeb periodic orbits after a bypass attachmentHAL CCSD2012Contact geometryReeb vector fieldContact homologyHyperbolic dynamics[MATH.MATH-SG] Mathematics [math]/Symplectic Geometry [math.SG][MATH.MATH-DS] Mathematics [math]/Dynamical Systems [math.DS]Vaugon, Anne2012-12-24 19:51:082019-11-19 11:13:092012-12-26 10:10:33enPreprints, Working Papers, ...https://hal-ens-lyon.archives-ouvertes.fr/ensl-00768825/documentapplication/pdf1On a 3-dimensional contact manifold with boundary, a bypass attachment is an elementary change of the contact structure consisting in the attachment of a thickened half-disc with a prescribed contact structure along an arc on the boundary. We give a model bypass attachment in which we describe the periodic orbits of the Reeb vector field created by the bypass attachment in terms of Reeb chords of the attachment arc. As an application, we compute the contact homology of a product neighbourhood of a convex surface after a bypass attachment, and the contact homology of some contact structures on solid tori.