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arXiv 0801.4320math.AGmath.CV
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关于$(a,b)$ -模的两个有限性定理

Two finiteness theorem for $(a,b)$-module

Daniel Barlet

摘要:

我们证明了以下两个结果1.对于圆盘上复流形$X$的一个真全纯函数$ f : X \to D$,使得$\{df = 0 \} \subset f^{-1}(0)$,我们用函子的方法构造了一个与$p$的Gauss-Manin连接相关联的几何(a,b)-模$E^p$.这个第一定理是一个存在性/有限性结果,它表明几何(a,b)-模可以用于全局情形。2.对于任何正则(a,b)-模$E$,我们给出一个整数$N(E)$,该整数由$E$的简单不变量显式给出,使得$E\big/b^{N(E)}.E$的同构类决定了$E$的同构类。这第二个结果允许削减渐近展开(在$b$的权力)的$E$的元素,而不会丢失任何信息。

英文摘要:

We prove the following two results 1. For a proper holomorphic function $ f : X \to D$ of a complex manifold $X$ on a disc such that $\{df = 0 \} \subset f^{-1}(0)$, we construct, in a functorial way, for each integer $p$, a geometric (a,b)-module $E^p$ \ associated to the (filtered) Gauss-Manin connexion of $f$. This first theorem is an existence/finiteness result which shows that geometric (a,b)-modules may be used in global situations. 2. For any regular (a,b)-module $E$ we give an integer $N(E)$, explicitely given from simple invariants of $E$, such that the isomorphism class of $E\big/b^{N(E)}.E$ determines the isomorphism class of $E$. This second result allows to cut asymptotic expansions (in powers of $b$) \ of elements of $E$ without loosing any information.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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