Annular Rasmussen Invariants: Properties and 3-Braid Classification
Annular Rasmussen Invariants: Properties and 3-Braid Classification
复制标题
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
中科院分区:
文献类型:
--
作者:
Gage Martin
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.
影响因子:
0.6
作者:
Hubbard, Diana;Lee, Christine Ruey
通讯作者:
Lee, Christine Ruey