A refinement of Rasmussen's s-invariant

A refinement of Rasmussen's s-invariant
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Rasmussen s 不变量的改进

DOI:
10.1215/00127094-2644466
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发表时间:
2012
期刊:
arXiv: Geometric Topology
影响因子:
--
通讯作者:
Sucharit Sarkar
Sucharit Sarkar
中科院分区:
--
文献类型:
--
作者:
Robert Lipshitz;Sucharit Sarkar

文献摘要

被引文献

相似文献

在上一篇论文中,我们构造了Khovanov同调的谱级细化。该改进导出了Khovanov同调上的稳定上同调运算。本文证明了这些上同调运算在Khovanov同调上与协同映射交换。因此,我们得到了每个稳定上同调运算的Rasmussen切片格界s的细化。我们证明了在Steenrod平方的情况下,我们的细化严格强于s。
In a previous paper we constructed a spectrum-level refinement of Khovanov homology. This refinement induces stable cohomology operations on Khovanov homology. In this paper we show that these cohomology operations commute with cobordism maps on Khovanov homology. As a consequence we obtain a refinement of Rasmussen's slice genus bound s for each stable cohomology operation. We show that in the case of the Steenrod square Sq^2 our refinement is strictly stronger than s.