Local properties of self-dual harmonic 2-forms on a 4-manifold
Local properties of self-dual harmonic 2-forms on a 4-manifold
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4-流形上自对偶调和 2-形式的局部性质
DOI:
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发表时间:
1997
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通讯作者:
K. Honda
中科院分区:
文献类型:
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作者:
K. Honda
Abstract We prove a Moser-type theorem for self-dual harmonic 2-forms on closed 4-manifolds, and use it to classify local forms on neighborhoods of singular circles on which the 2-form vanishes. Removing neighborhoods of the circles, we obtain a symplectic manifold with contact boundary—we show that the contact form on each S1 × S2, after a slight modification, must be one of two possibilities.