%0 Journal Article
%A Muñoz, Vicente
%A Tralle, Aleksy
%T Simply connected K-contact and Sasakian manifolds of dimension 7
%D 2015
%@ 0025-5874
%U https://hdl.handle.net/20.500.14352/34868
%X We construct a compact simply-connected 7-dimensional manifold admitting a K-contact structure but not a Sasakian structure. We also study rational homotopy properties of such manifolds, proving in particular that a simply-connected 7-dimensional Sasakian manifold has vanishing cup-product on the second cohomology and that it is formal if and only if all its triple Massey products vanish.
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