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arXiv 2407.08433math.SG
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关于一般辛矩阵路径的Maslov型指标

On the Maslov-type index for general paths of symplectic matrices

Department of Mathematics, Jinan University(暨南大学数学系);School of Mathematics, Sichuan University(四川大学数学学院)

Hai-Long Her, Qiyu Zhong

AI总结:

本文为具有任意端点的一般辛路径直接构造了一种Maslov型指标,该指标部分推广了Conley-Zehnder-Long指标,且构造不依赖起点是否为单位矩阵,并可与Cappell-Lee-Miller指标建立联系。

摘要:

在本文中,我们为具有两个任意端点的一般辛路径定义了一个Maslov型指标。该Maslov型指标是Conley-Zehnder-Long指标的部分推广,其意义在于辛矩阵的退化集更大。构造该指标的方法是直接的,不借助拉格朗日路径的Maslov指标,并且无论路径的起点是否为单位矩阵,构造方法都是一致的,这与Long的Maslov型指标和Liu的$L_0$-指标不同。我们验证了该指标的一些自然性质。我们回顾了其他版本的Maslov指标,并将它们与我们的定义进行比较。特别地,从辛路径指标的角度看,该Maslov型指标可以视为一对拉格朗日路径的Cappell-Lee-Miller指标的一种实现。

英文摘要:

In this article, we define an index of Maslov type for general symplectic paths which have two arbitrary end points. This Maslov-type index is a partial generalization of the Conley-Zehnder-Long index in the sense that the degenerate set of symplectic matrices is larger. The method of constructing the index is direct without taking advantage of Maslov index of Lagrangian paths and consistent no matter whether the starting point of the path is identity or not, which is different from the ones for Long's Maslov-type index and Liu's $L_0$-index. Some natural properties for the index are verified. We review other versions of Maslov indices and compare them with our definition. In particular, this Maslov-type index can be regarded as a partial realization of Cappell-Lee-Miller index for a pair of Lagrangian paths from the point of view of index for symplectic paths.

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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