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arXiv 1107.4702math.GT
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Lee同调的链接协调不变量

The link concordance invariant from Lee homology

John Pardon

摘要:

我们使用Khovanov和Lee的结同源性来构建链接一致性不变量,从而推广了结的Rasmussen $s$ -不变量。链接的相关不变量是维度为$2^{|L|}$的向量空间上的过滤。$s$ -不变量的基本性质都扩展到链接的情况;特别是,链接之间的任何可定向配边$Σ$导致其对应的向量空间之间的映射,该映射是度过滤的$χ(Σ)$。这种构造的一个推论是,从$\Kh$ -瘦链接到被分成$k$组件的链接的任何保持可定向配边的组件必须至少具有亏格$\lfloor\frac k2\rfloor$。特别地,没有准交替链路与分裂链路一致。

英文摘要:

We use the knot homology of Khovanov and Lee to construct link concordance invariants generalizing the Rasmussen $s$-invariant of knots. The relevant invariant for a link is a filtration on a vector space of dimension $2^{|L|}$. The basic properties of the $s$-invariant all extend to the case of links; in particular, any orientable cobordism $Σ$ between links induces a map between their corresponding vector spaces which is filtered of degree $χ(Σ)$. A corollary of this construction is that any component preserving orientable cobordism from a $\Kh$-thin link to a link split into $k$ components must have genus at least $\lfloor\frac k2\rfloor$. In particular, no quasi-alternating link is concordant to a split link.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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