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arXiv 0906.1373math.GTmath.GR
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准素分解与纽结协调度的分形性质

Primary decomposition and the fractal nature of knot concordance

Tim D. Cochran, Shelly Harvey, Constance Leidy

摘要:

对于每个多项式序列,P=(p_1(t),p_2(t),.),我们定义了群的一个特征列,称为局部化在P的导出列。给定S ^3中的一个纽结K,这样一个多项式列自然地作为K的高阶亚历山大模序列的某些子模的阶而出现。这些群序列产生新的过滤结和谐群,完善的(n)-可解过滤的Cochran-Orr-Teichner。我们证明了这些精化滤子的连续项的秩是无限的。这些结果也表明代数和谐群的p(t)-准素分解的高阶类似物。我们使用这些技术给证据表明,一组光滑的和谐类结是一个分形集。我们还表明,没有Cochran-Orr-Teichner结是一致的任何Cochran-Harvey-Leidy结。

英文摘要:

For each sequence of polynomials, P=(p_1(t),p_2(t),...), we define a characteristic series of groups, called the derived series localized at P. Given a knot K in S^3, such a sequence of polynomials arises naturally as the orders of certain submodules of the sequence of higher-order Alexander modules of K. These group series yield new filtrations of the knot concordance group that refine the (n)-solvable filtration of Cochran-Orr-Teichner. We show that the quotients of successive terms of these refined filtrations have infinite rank. These results also suggest higher-order analogues of the p(t)-primary decomposition of the algebraic concordance group. We use these techniques to give evidence that the set of smooth concordance classes of knots is a fractal set. We also show that no Cochran-Orr-Teichner knot is concordant to any Cochran-Harvey-Leidy knot.

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