On the set of L-space surgeries for links
On the set of L-space surgeries for links
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关于链接的 L 空间手术集
DOI:
10.1016/j.aim.2018.05.009
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发表时间:
2018
影响因子:
1.7
通讯作者:
Némethi, András
中科院分区:
文献类型:
--
作者:
Gorsky, Eugene;Némethi, András
We study the qualitative structure of the setLSof integral L-space surgery slopes for links with two components. It is known that the set of L-space surgery slopes for a nontrivial L-space knot is always a positive half-line. However, already for two-component torus links the setLShas a very complicated structure, e.g. in some cases it can be unbounded from below. In order to probe the geometry of this set, we ask if it is bounded from below for more general L-space links with two components.For algebraic two-component links we provide three complete characterizations for the boundedness from below: one in terms of the Alexander polynomial, one in terms of the embedded resolution graph, and one in terms of the so-calledh-function introduced by the authors in [9]. It turns out thatLSis bounded from below for most algebraic links. If it is unbounded from below, it must contain a negative half-line parallel to one of the axes. We also give a sufficient condition for boundedness for arbitrary L-space links.
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DOI:
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