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arXiv 2302.07259math.SG
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勒让德嵌入接触同调

Legendrian embedded contact homology

Julian Chaidez, Oliver Edtmair, Luya Wang, Yuan Yao, Ziwen Zhao

摘要:

对于具有凸缝合边界的接触流形$3$-$Y$和包含在$\partial Y$中的一对Legendrians $Λ_+$和$Λ_-$满足一个精确性条件,给出了嵌入接触同调的构造.链复合物由$Y$的闭合Reeb轨道和$Λ_+$到$Λ_-$的Reeb弦的某些构型产生。主要成分包括:本文给出了$\mathbb{R} \times Y$中曲线的Legendrian附加公式,曲线与$\mathbb{R} \times Λ$接触的相对扭曲界,曲线与$3$ -流形接触的相对扭曲界渐近于Reeb弦,以及Legendrian ECH指标与ECH指标不等式.闭合接触$3$ -流形$Y$和Legendrian链路$Λ$的任何对$(Y,Λ)$的(作用过滤的)Legendrian ECH也可以在传递到缝合链路补之后使用该机制来定义。这项工作的基础上提出的想法在科林Ghiggini本田的证明等价的Heegaard- Floer同源性和ECH。我们对殆复结构和接触形式的选择的构造的独立性,应该要求一种新的风格,即弗洛尔同调。这超出了本文的范围。

英文摘要:

We give a construction of embedded contact homology (ECH) for a contact $3$-manifold $Y$ with convex sutured boundary and a pair of Legendrians $Λ_+$ and $Λ_-$ contained in $\partial Y$ satisfying an exactness condition. The chain complex is generated by certain configurations of closed Reeb orbits of $Y$ and Reeb chords of $Λ_+$ to $Λ_-$. The main ingredients include: a general Legendrian adjunction formula for curves in $\mathbb{R} \times Y$ with boundary on $\mathbb{R} \times Λ$; a relative writhe bound for curves in contact $3$-manifolds asymptotic to Reeb chords; and a Legendrian ECH index with an accompanying ECH index inequality. The (action filtered) Legendrian ECH of any pair $(Y,Λ)$ of a closed contact $3$-manifold $Y$ and a Legendrian link $Λ$ can also be defined using this machinery after passing to a sutured link complement. This work builds on ideas present in Colin-Ghiggini-Honda's proof of the equivalence of Heegaard-Floer homology and ECH. The independence of our construction of choices of almost complex structure and contact form should require a new flavor of monopole Floer homology. It is beyond the scope of this paper.

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