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arXiv 1805.01166math.AG
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关于一般孤立平面曲线奇点的$b$ -指数

On the $b$-exponents of generic isolated plane curve singularities

E. Artal Bartolo, P. Cassou Noguès, I. Luengo, A. Melle-Hernández

摘要:

1982年,Tamaki Yano提出了一个猜想,预测了不可约平面曲线的$b$ -指数集如何在其等奇异性类中是通用的。1986年,Pi。卡苏-诺格斯证明了一个Pui-puix对的情况下猜想。在以前的工作中,作者证明了猜想两个Puixix对芽的复代数monodromy有不同的特征值。由Yano猜想引起的一个自然问题是,对于孤立的平面曲线奇异芽的一般等奇异变形,研究$b$ -指数集如何依赖于奇异点的拓扑。由矢野的方法提出的自然推广在适当的例子中成立(对于孤立奇点的情况,这些奇点是牛顿非退化的,commode并且其谱数集都是不同的)。此外,我们用一个例子表明,这种自然的概括是不正确的。我们限制到细菌的复杂的代数monodromy有不同的特征值,使嵌入的决议图的顶点的价在最多3,我们讨论了一些例子与多个特征值。

英文摘要:

In 1982, Tamaki Yano proposed a conjecture predicting how is the set of $b$-exponents of an irreducible plane curve singularity germ which is generic in its equisingularity class. In 1986, Pi.~Cassou-Noguès proved the conjecture for the one Puiseux pair case. In a previous work the authors proved the conjecture for two Puiseux pairs germs whose complex algebraic monodromy has distinct eigenvalues. A natural problem induced by Yano's conjecture is, for a generic equisingular deformation of an isolated plane curve singularity germ to study how the set of $b$-exponents depends on the topology of the singularity. The natural generalization suggested by Yano's approach holds in suitable examples (for the case of isolated singularites which are Newton non-degenerated, commode and whose set of spectral numbers are all distincts). Morevover we show with an example that this natural generalization is not correct. We restrict to germs whose complex algebraic monodromy has distinct eigenvalues such that the embedded resolution graph has vertices of valency at most 3 and we discuss some examples with multiple eigenvalues.

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