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arXiv 2402.05093math.AG
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具有非退化牛顿边界的复奇点的模参数

Moduli Parameters of Complex Singularities with Non-Degenerate Newton Boundary

Janko Boehm, Magdaleen S. Marais, Gerhard Pfister

AI总结:

本文提出一种算法,计算具有非退化牛顿边界的复奇点在规范形式族中的模参数值,以理解其模堆,并已在Singular系统中实现。

摘要:

我们最近对Arnold分类的扩展包括了所有余秩至多二的奇点,这些奇点等价于具有非退化牛顿边界的芽,从而通过一个在模数和Milnor数方面无界的类别显著拓宽了分类的范围。该方法基于证明在μ-常数层内的所有右等价类可以由一个单一规范形式表示,该规范形式源自于适当选择的特殊纤维的正则基。虽然Arnold和我们先前关于规范形式的工作都涉及确定包含给定芽的规范形式族,但本文采取了下一个自然步骤:我们提出了一种算法,用于计算给定芽在其规范形式族中的模参数值,即在其稳定等价类中的规范形式方程。该算法对于理解此类奇点的模堆将至关重要。该算法的实现以及基础的分类技术已在计算机代数系统Singular的库arnold.lib中实现。

英文摘要:

Our recent extension of Arnold's classification includes all singularities of corank up to two equivalent to a germ with a non-degenerate Newton boundary, thus broadening the classification's scope significantly by a class which is unbounded with respect to modality and Milnor number. This method is based on proving that all right-equivalence classes within a mu-constant stratum can be represented by a single normal form derived from a regular basis of a suitably selected special fiber. While both Arnold's and our preceding work on normal forms addresses the determination of a normal form family containing the given germ, this paper takes the next natural step: We present an algorithm for computing for a given germ the values of the moduli parameters in its normal form family, that is, a normal form equation in its stable equivalence class. This algorithm will be crucial for understanding the moduli stacks of such singularities. The implementation of this algorithm, along with the foundational classification techniques, is implemented in the library arnold.lib for the computer algebra system Singular.

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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