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arXiv 0709.1507math.GT
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彩色线结的手术描述

Surgery description of colored knots

R. A. Litherland, Steven D. Wallace

摘要:

由纽结K和从纽结群到二面体群的满射r组成的对(K,r)称为p-着色纽结。D. Moskovich证明,对于任何奇素数p,在着色的核中,沿着解结,有p个等价类的p-着色结。我们证明了至多有2 p个等价类。这是对Moskovich以前关于p=3和5的结果的巨大改进,一般没有给出上界。T. Cochran,A. Gerges和K. Orr在“Dehn surgery等价关系of 3-manifold”中,定义了闭3-manifold M的surgery等价类在边界条件下的不变量.通过取M为沿K的3-球面的0-框架外科手术,我们可以以与Cochran-Gerges-Orr不变量相同的方式定义Moskovich的有色解绑不变量。然后,将使用着色解绑不变量的这种协边定义来建立上界。

英文摘要:

The pair (K,r) consisting of a knot K and a surjective map r from the knot group onto a dihedral group is said to be a p-colored knot. D. Moskovich conjectured that for any odd prime p there are exactly p equivalence classes of p-colored knots up to surgery along unknots in the kernel of the coloring. We show that there are at most 2p equivalence classes. This is a vast improvement upon the previous results by Moskovich for p=3, and 5, with no upper bound given in general. T. Cochran, A. Gerges, and K. Orr, in "Dehn surgery equivalence relations of 3-manifolds", define invariants of the surgery equivalence class of a closed 3-manifold M in the context of bordisms. By taking M to be 0-framed surgery of the 3-sphere along K we may define Moskovich's colored untying invariant in the same way as the Cochran-Gerges-Orr invariants. This bordism definition of the colored untying invariant will be then used to establish the upper bound.

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