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arXiv 1912.02002math.AGmath.GT
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$R^4$中的表面奇异性:向着Lipschitz纽结理论的第一步

Surface singularities in $R^4$: first steps towards Lipschitz knot theory

Lev Birbrair, Andrei Gabrielov

摘要:

$R^4$中二维半代数曲面的孤立奇点的链环是$S^3$中的纽结(或链环)。因此,$R^4$中表面奇点的环境Lipschitz分类可以被解释为$S^3$中结(或链接)的拓扑分类的双Lipschitz细化。我们发现,给定一个结$K$在$S^3$,有无穷多个不同的环境Lipschitz等价类的外部度量Lipschitz等价奇点在$R^4$与链接拓扑等价于$K$。

英文摘要:

A link of an isolated singularity of a two-dimensional semialgebraic surface in $R^4$ is a knot (or a link) in $S^3$. Thus the ambient Lipschitz classification of surface singularities in $R^4$ can be interpreted as a bi-Lipschitz refinement of the topological classification of knots (or links) in $S^3$. We show that, given a knot $K$ in $S^3$, there are infinitely many distinct ambient Lipschitz equivalence classes of outer metric Lipschitz equivalent singularities in $R^4$ with the links topologically equivalent to $K$.

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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