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arXiv 0910.4035math.AG
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加权齐次表面奇点的嵌入维数

The embedding dimension of weighted homogeneous surface singularities

András Némethi, Tomohiro Okuma

AI总结:

研究加权齐次表面奇点的嵌入维数及其与Seifert不变量的关系,通过显式公式和例子揭示其非拓扑性质。

摘要:

我们分析了正常加权齐次表面奇点的嵌入维数,并更一般地,研究了在链接为有理同调球的情况下,正则函数的格雷德代数最小生成集的Poincaré级数。在几个子族的情况下,我们提供了以Seifert不变量(推广Wagreich和VanDyke的结果)为术语的显式公式,并提供了关键例子表明,一般情况下这些不变量并非拓扑的。我们还将讨论扩展到具有星型图的splice-商奇点的情况。

英文摘要:

We analyze the embedding dimension of a normal weighted homogeneous surface singularity, and more generally, the Poincaré series of the minimal set of generators of the graded algebra of regular functions, provided that the link of the germs is a rational homology sphere. In the case of several sub-families we provide explicit formulas in terms of the Seifert invariants (generalizing results of Wagreich and VanDyke), and we also provide key examples showing that, in general, these invariants are not topological. We extend the discussion to the case of splice--quotient singularities with star--shaped graph as well.

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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