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arXiv 1406.0328math.AG
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关于稳定牛顿退化奇点的猜想

Conjectures on stably Newton degenerate singularities

Chalmers University of Technology(查尔姆斯理工大学);University of Gothenburg(哥德堡大学)

Jan Stevens

AI总结:

本文讨论Arnold问题,提出存在函数不能通过稳定化变为牛顿图非退化,并给出反例;同时猜想特征有限时非退化奇点没有wild消失圈,并论证不可约平面曲线稳定非退化。

摘要:

我们讨论Arnold的一个问题:是否每个函数都稳定等价于一个对其牛顿图非退化的函数?我们认为答案是否定的。我们描述了一种在稳定化后使函数非退化的方法,并给出了该方法失效的奇点例子。我们猜想这些奇点实际上是稳定退化的,即不与非退化函数稳定等价。我们回顾了文献中的各种非退化概念。对于有限特征,我们猜想非退化奇点没有wild消失圈。这意味着具有有限Milnor数的最简单奇点例子,即特征p中的$x^p+x^q$,不与非退化函数稳定等价。我们论证了具有任意多个Puiseux对(在特征零中)的不可约平面曲线是稳定非退化的。由于稳定化涉及许多变量,通常很难确定牛顿图,但方程的形式表明定义函数是非退化的。

英文摘要:

We discuss a problem of Arnold, whether every function is stably equivalent to one which is non-degenerate for its Newton diagram. We argue that the answer is negative. We describe a method to make functions non-degenerate after stabilisation and give examples of singularities where this method does not work. We conjecture that they are in fact stably degenerate, that is not stably equivalent to non-degenerate functions. We review the various non-degeneracy concepts in the literature. For finite characteristic we conjecture that there are nowild vanishing cycles for non-degenerate singularities. This implies that the simplest example of singularities with finite Milnor number, $x^p+x^q$ in characteristic $p$, is not stably equivalent to a non-degenerate function. We argue that irreducible plane curves with an arbitrary number of Puiseux pairs (in characteristic zero) are stably non-degenerate. As the stabilisation involves many variables, it becomes very difficult to determine the Newton diagram in general, but the form of the equations indicates that the defining functions are non-degenerate.

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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