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arXiv 0902.1731math.GT
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三维流形的Milnor度

The Milnor degree of a three-manifold

Tim Cochran, Paul Melvin

摘要:

3-流形的米尔诺尔度是一个不变量,它记录了3-球面中任何可以被冲到流形上的链接的最大简单性。研究了挠连接形式、基本群的幂零群、Massey乘积和量子不变量等条件下的3-流形的不变性,证明了具有任意Milnor度和第一贝蒂数的3-流形的存在性.一路上,它表明,数量M(k,r)的线性无关Milnor不变量的程度k,区分r-分量链接的3-球的较低程度的不变量消失,是积极的,除了在经典已知的情况下(当r = 1,当r = 2,k = 2,4或6)。

英文摘要:

The Milnor degree of a 3-manifold is an invariant that records the maximum simplicity, in terms of higher order linking, of any link in the 3-sphere that can be surgered to give the manifold. This invariant is investigated in the context of torsion linking forms, nilpotent quotients of the fundamental group, Massey products and quantum invariants, and the existence of 3-manifolds with any prescribed Milnor degree and first Betti number is established. Along the way, it is shown that the number M(k,r) of linearly independent Milnor invariants of degree k, distinguishing r-component links in the 3-sphere whose lower degree invariants vanish, is positive except in the classically known cases (when r = 1, and when r = 2 with k = 2, 4 or 6).

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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