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arXiv math/0012096math.SGmath.AG
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关于辛形式的模空间

On moduli spaces of symplectic forms

Ivan Smith

摘要:

证明了对于任意n,存在允许n个辛形式元组的单连通四流形,其第一陈类在积分上同调中具有两两不同的整除性。因此,在这样的流形上的辛形式模同态的模空间至少有n个连通分支。

英文摘要:

We prove that, for any n, there are simply-connected four-manifolds which admit n-tuples of symplectic forms whose first Chern classes have pairwise different divisibilities in integral cohomology. It follows that the moduli space of symplectic forms modulo diffeomorphisms on such a manifold has at least n connected components.

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