%0 Journal Article
%A Bazzoni, G.
%A Fernández, Marisa
%A Muñoz, Vicente
%T Non-formal co-symplectic manifolds
%D 2015
%@ 0002-9947
%U https://hdl.handle.net/20.500.14352/34631
%X We 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.
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