Examples of non-formal closed $(k-1)$-connected manifolds of dimensions $4k-1$ and more

Abstract

We construct closed $(k-1)$-connected manifolds of dimensions $\ge 4k-1$ that possess non-trivial rational Massey triple products. We also construct examples of manifolds $M$ such that all the cup-products of elements of $H^k(M)$ vanish, while the group $H^{3k-1}(M;\Q)$ is generated by Massey products: such examples are useful for theory of systols.

Latex, 4 pages, minor changes in extended version

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