Abstract.
We introduce the concept of s–formal minimal model as an extension of formality. We prove that any orientable compact manifold M, of dimension 2n or (2n−1), is formal if and only if M is (n−1)–formal. The formality and the hard Lefschetz property are studied for the Donaldson submanifolds of symplectic manifolds constructed in [13]. This study permits us to show an example of a Donaldson symplectic submanifold of dimension eight which is formal simply connected and does not satisfy the hard Lefschetz theorem.
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An erratum to this article is available at http://dx.doi.org/10.1007/s00209-007-0208-2.
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Fernández, M., Muñoz, V. Formality of Donaldson submanifolds. Math. Z. 250, 149–175 (2005). https://doi.org/10.1007/s00209-004-0747-8
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DOI: https://doi.org/10.1007/s00209-004-0747-8