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arXiv 1702.04609math.SGmath.DSmath.GT
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具有对称性的局部Morse同调的横截性及其应用

Transversality for local Morse homology with symmetries and applications

Doris Hein, Umberto L. Hryniewicz, Leonardo Macarini

摘要:

证明了定义具有有限循环群对称性的局部Morse链复形所必需的横截性结果。我们的论点使用特殊的正则化距离函数构造使用经典的覆盖引理,和一个归纳扰动过程索引的各向同性集的地层。本文还证明了对称Morse-Smale对的整体存在性定理。在应用方面,我们专注于哈密顿动力学,并严格建立了一个基于离散作用泛函的局部接触同调包。我们证明了一个持久性定理,类似于经典的移动引理测地线,断言迭代映射是一个同构良好的和容许的迭代。我们还考虑了非不变局部Morse同调上的Chas-Sullivan积,它起着裤子对积的作用,并研究了它与辛退化极大值的关系。最后,我们探讨了如何我们的不变量可以用来研究分歧的临界点(和周期点)下额外的对称性。

英文摘要:

We prove the transversality result necessary for defining local Morse chain complexes with finite cyclic group symmetry. Our arguments use special regularized distance functions constructed using classical covering lemmas, and an inductive perturbation process indexed by the strata of the isotropy set. A global existence theorem for symmetric Morse-Smale pairs is also proved. Regarding applications, we focus on Hamiltonian dynamics and rigorously establish a local contact homology package based on discrete action functionals. We prove a persistence theorem, analogous to the classical shifting lemma for geodesics, asserting that the iteration map is an isomorphism for good and admissible iterations. We also consider a Chas-Sullivan product on non-invariant local Morse homology, which plays the role of pair-of-pants product, and study its relationship to symplectically degenerate maxima. Finally, we explore how our invariants can be used to study bifurcation of critical points (and periodic points) under additional symmetries.

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