Annular Rasmussen Invariants: Properties and 3-Braid Classification

Annular Rasmussen Invariants: Properties and 3-Braid Classification
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环形 Rasmussen 不变量:属性和 3 辫分类

DOI:
10.1307/mmj/20205963
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发表时间:
2019
影响因子:
0.9
通讯作者:
Gage Martin
Gage Martin
中科院分区:
数学3区
文献类型:
--
作者:
Gage Martin

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证明了对于固定的编织指标,编织闭包的环形Rasmussen $d_t$不变量只有有限多个可能的形状。将同样的观点应用于结花不变量$\Upsilon_K(t)$,我们证明了对于$K$的一个固定的一致性格$\Upsilon_K(t)$只有有限多个可能性。以3-辫型闭包为例,计算了所有3-辫型闭包的Rasmussen $s$不变量和环形Rasmussen $d_t$不变量。作为推论,我们证明$\psi$不变量的消失/不消失完全由$s$不变量和自连接数决定。
We prove that for a fixed braid index there are only finitely many possible shapes of the annular Rasmussen $d_t$ invariant of braid closures. Applying the same perspective to the knot Floer invariant $\Upsilon_K(t)$, we show that for a fixed concordance genus of $K$ there are only finitely many possibilities for $\Upsilon_K(t)$. Focusing on the case of 3-braids, we compute the Rasmussen $s$ invariant and the annular Rasmussen $d_t$ invariant of all 3-braid closures. As a corollary, we show that the vanishing/non-vanishing of the $\psi$ invariant is entirely determined by the $s$ invariant and the self-linking number.
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DOI: 10.1016/j.topol.2020.107146
发表时间: 2020
影响因子: 0.6
作者:
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通讯作者: Lee, Christine Ruey