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arXiv 1607.04348math.GT
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无显式2-上圈的Quandle 2-上圈纽结不变量的计算

Computation of quandle 2-cocycle knot invariants without explicit 2-cocycles

W. Edwin Clark, Larry A. Dunning, Masahico Saito

摘要:

我们探索了一个结不变量来自相应的$1$ -缠结与任意连接quandles的着色。当quandle是某种类型的阿贝尔扩张时,该不变量等价于quandle $2$ -上循环不变量。我们构造了许多这样的阿贝尔扩展使用广义亚历山大quandles没有明确发现$2$ -上循环。这允许许多$2$ -上环不变量的构建,而不显示明确的$2$ -上环。我们证明了对于连通的广义Alexander量子点,其不变量等价于Kubermann的结着色多项式。使用这种技术的计算表明,$2$ -cocycle不变量区分所有的定向素数结多达11个交叉和大多数定向素数结与12个交叉,包括分类的对称性:镜像,反转,反转镜。

英文摘要:

We explore a knot invariant derived from colorings of corresponding $1$-tangles with arbitrary connected quandles. When the quandle is an abelian extension of a certain type the invariant is equivalent to the quandle $2$-cocycle invariant. We construct many such abelian extensions using generalized Alexander quandles without explicitly finding $2$-cocycles. This permits the construction of many $2$-cocycle invariants without exhibiting explicit $2$-cocycles. We show that for connected generalized Alexander quandles the invariant is equivalent to Eisermann's knot coloring polynomial. Computations using this technique show that the $2$-cocycle invariant distinguishes all of the oriented prime knots up to 11 crossings and most oriented prime knots with 12 crosssings including classification by symmetry: mirror images, reversals, and reversed mirrors.

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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