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arXiv 1806.02440math.GT
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关于带手术和结的签名的说明

A note on band surgery and the signature of a knot

Allison H. Moore, Mariel Vazquez

摘要:

带状手术是一种手术,涉及对结或链接在三个领域。我们证明,如果两个准交替结$K$和$K'$的相同的平方自由行列式是相关的带手术,然后在他们的签名之差的绝对值是0或8。这种障碍源于一个更一般的定理,该定理关于Heegaard Floer $d$ -L空间对的不变量的差异,这些L空间对通过距离1 Dehn填充相关并满足第一同调中的某些条件。这些结果表明,$T(2, 5)$是唯一一种环形结$T(2, m)$,其$m$无方形,允许手性美容条带,即对其镜像进行条带手术。最后,我们讨论了手性化妆品带的稀缺性。

英文摘要:

Band surgery is an operation relating pairs of knots or links in the three-sphere. We prove that if two quasi-alternating knots $K$ and $K'$ of the same square-free determinant are related by a band surgery, then the absolute value of the difference in their signatures is either 0 or 8. This obstruction follows from a more general theorem about the difference in the Heegaard Floer $d$-invariants for pairs of L-spaces that are related by distance one Dehn fillings and satisfy a certain condition in first homology. These results imply that $T(2, 5)$ is the only torus knot $T(2, m)$ with $m$ square-free that admits a chirally cosmetic banding, i.e. a band surgery operation to its mirror image. We conclude with a discussion on the scarcity of chirally cosmetic bandings.

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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