Bazzoni, G.Fernández, MarisaMuñoz, Vicente2023-06-192023-06-1920150002-994710.1090/S0002-9947-2014-06361-7https://hdl.handle.net/20.500.14352/34631We study the formality of the mapping torus of an orientation-preserving diffeomorphism of a manifold. In particular, we give conditions under which a mapping torus has a non-zero Massey product. As an application we prove that there are non-formal compact co-symplectic manifolds of dimension m and with first Betti number b if and only if m = 3 and b >= 2, or m >= 5 and b >= 1. Explicit examples for each one of these cases are given.engjournal articlehttp://www.ams.org/journals/tran/2015-367-06/S0002-9947-2014-06361-7/home.htmlrestricted access514Co-symplectic manifoldMapping torusMinimal modelFormal manifold.Geometría1204 Geometría