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arXiv math/9912099math.AG
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关于自由和几乎自由因子的Differential forms

Differential forms on free and almost free divisors

David Mond

摘要:

我们介绍了一个变种的自由和几乎自由的因子和他们的变形通常的Kahler形式,并表明他们享有相同的深度特性作为Kahler形式孤立的完全相交奇点。使用这些形式,可以解析地描述自由因子族中的消失上同调,与Brieskorn和Greuel对ICIS的Milnor纤维化的经典描述精确类比。这特别适用于不稳定映射芽的双变形的判别式族。

英文摘要:

We introduce a variant of the usual Kahler forms on free and almost free divisors and their deformations, and show that they enjoy the same depth properties as Kahler forms on isolated complete intersection singularities. Using these forms, it is possible to describe analytically the vanishing cohomology in families of free divisors, in precise analogy with the classical description for the Milnor fibration of an ICIS, due to Brieskorn and Greuel. This applies in par- ticular to the family of discriminants of a versal deformation of an unstable map-germ.

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