Crosscap number of knots and volume bounds
Crosscap number of knots and volume bounds
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Crosscap 结数和体积界限
DOI:
10.1142/s0129167x20501116
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发表时间:
2020
影响因子:
0.6
通讯作者:
Takimura Yusuke
中科院分区:
文献类型:
--
作者:
Ito Noboru;Takimura Yusuke
In this paper, we obtain the crosscap number of any alternating knots by using our recently-introduced diagrammatic knot invariant (Theorem 1). The proof is given by properties of chord diagrams (Kindred proved Theorem 1 independently via other techniques). For non-alternating knots, we give Theorem 2 that generalizes Theorem 1. We also improve known formulas to obtain upper bounds of the crosscap number of knots (alternating or non-alternating) (Theorem 3). As a corollary, this paper connects crosscap numbers and our invariant with other knot invariants such as the Jones polynomial, twist number, crossing number, and hyperbolic volume (Corollaries 1–7). In Appendix A, using Theorem 1, we complete giving the crosscap numbers of the alternating knots with up to 11 crossings including those of the previously unknown values forknots (Tables A.1).
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影响因子:
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DOI:
--
发表时间:
2020
期刊:
影响因子:
--
作者:
N. Ito;Yusuke Takimura
通讯作者:
Yusuke Takimura