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arXiv math/0304195math.AG
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弧对称集的动机不变量与Blow-Nash等价

Motivic invariants of Arc-Symmetric sets and Blow-Nash Equivalence

Goulwen Fichou

摘要:

我们定义了不变量的blow-Nash等价的真正的解析函数芽,以类似的方式,动机zeta函数的Denef和Loeser。作为一个关键的组成部分,我们推广了虚贝蒂数,这是已知的实代数集,作为一个广义的欧拉示性数的投影可构造的弧-代数集。实际上我们证明了:虚贝蒂数不仅是反对称集的代数不变式,而且是反对称集的Nash不变式。我们的zeta函数,使素描blow-Nash等价类的Brieskorn多项式的两个变量。

英文摘要:

We define invariants of the blow-Nash equivalence of real analytic function germs, in a similar way that the motivic zeta functions of Denef & Loeser. As a key ingredient, we extend the virtual Betti numbers, which were known for real algebraic sets, as a generalized Euler characteristics for projective constructible arc-symmetrics sets. Actually we prove more: the virtual Betti numbers are not only algebraic invariant, but also Nash-invariant of arc-symmetric sets. Our zeta functions enable to sketch the blow-Nash equivalence classes of Brieskorn polynomials of two variables.

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