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arXiv 1202.3463math.GT
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惠特尼塔古典链接索引

Whitney tower concordance of classical links

James Conant, Rob Schneiderman, Peter Teichner

摘要:

本文计算了经典连杆的惠特尼塔过滤。Whitney塔由Whitney盘的迭代阶段组成,并允许树值相交理论,表明过滤的相关分次导数是可生成的阿贝尔群。扭曲惠特尼塔的研究和一个新的二次细化的相交理论介绍,测量惠特尼盘框架障碍。结果表明,过滤是完全分类的Milnor不变量连同新的高阶Sato-Levine和高阶Arf不变量,这是一个扭曲的惠特尼塔框架在4球的3球的链接所界定的障碍。应用程序包括计算的摸索过滤,和新的几何特征的米尔诺的链接不变。

英文摘要:

This paper computes Whitney tower filtrations of classical links. Whitney towers consist of iterated stages of Whitney disks and allow a tree-valued intersection theory, showing that the associated graded quotients of the filtration are finitely generated abelian groups. Twisted Whitney towers are studied and a new quadratic refinement of the intersection theory is introduced, measuring Whitney disk framing obstructions. It is shown that the filtrations are completely classified by Milnor invariants together with new higher-order Sato-Levine and higher-order Arf invariants, which are obstructions to framing a twisted Whitney tower in the 4-ball bounded by a link in the 3-sphere. Applications include computation of the grope filtration, and new geometric characterizations of Milnor's link invariants.

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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