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arXiv 0910.0449math.GT
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关于准交替链接的外科观点

A surgical perspective on quasi-alternating links

Liam Watson

摘要:

我们表明,准交替链接自然出现时,考虑手术的强可逆L-空间结(即结,产生一个L-空间的一些Dehn手术)。特别是,我们表明,对于许多已知的类L-空间结,每一个足够大的手术可以实现为两重分支覆盖的准交替链接。因此,在$S^3$上通过手术获得的L-空间和作为准交替链接的双重分支覆盖的L-空间之间存在相当大的重叠。通过将这种方法应用于某些Seifert纤维空间,可以给出拟交替Montesinos链的迭代构造。

英文摘要:

We show that quasi-alternating links arise naturally when considering surgery on a strongly invertible L-space knot (that is, a knot that yields an L-space for some Dehn surgery). In particular, we show that for many known classes of L-space knots, every sufficiently large surgery may be realized as the two-fold branched cover of a quasi-alternating link. Consequently, there is considerable overlap between L-spaces obtained by surgery on $S^3$, and L-spaces resulting as two-fold branched covers of quasi-alternating links. By adapting this approach to certain Seifert fibered spaces, it is possible to give an iterative construction for quasi-alternating Montesinos links.

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