Mapping tori and homotopy properties of closed
symplectic four-manifolds -- Jaume Amoros

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Using mapping tori for surface diffeomorphisms in the Torelli
group, the authors supply examples of nonformal symplectic
4-folds satisfying the Hard Lefschetz theorem, with Massey
products vanishing up to any wished for order.  This is joint
work with D. Kotschick.