arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2409.05970math-phmath.DGmath.MP
收藏

非完整动量映射约化与 Chaplygin 型叶状结构

Nonholonomic momentum map reduction and a Chaplygin-type foliation

Paula Balseiro, Danilo Machado Tereza

AI总结:

本文通过引入基于守恒量和非完整动量丛映射的约化框架,证明非完整系统动量水平集的约化空间具有几乎辛结构,并揭示其叶状结构的每个叶均为带有磁项的 Chaplygin 型余切丛。

摘要:

本文针对具有对称性的非完整系统,提出了一种动量映射约化框架,该框架扩展了文献[3,25]中先前的构造,其基础是某些守恒量的存在,并本质性地利用了文献[10]中的非完整动量丛映射。我们证明,动量水平集的约化空间携带一个几乎辛形式,该形式编码了约化后的动力学。这些约化流形是与一个几乎泊松括号相关联的叶状结构的叶,该几乎泊松括号是通过对非完整括号进行(动力学相容的)规范变换得到的。我们证明,每个叶都是一个“Chaplygin 型叶”,即它同构于一个余切丛,并带有典范辛形式加上一个“磁项”。

英文摘要:

This paper presents a set-up for momentum map reduction of nonholonomic systems with symmetries, extending previous constructions in [3,25], based on the existence of certain conserved quantities and making essential use of the nonholonomic momentum bundle map of [10]. We show that the reductions of the momentum level sets carry an almost symplectic form codifying the reduced dynamics. These reduced manifolds are the leaves of the foliation associated with an almost Poisson bracket obtained by a (dynamically compatible) gauge transformation of the nonholonomic bracket. We show that each leaf is a "Chaplygin-type leaf", in the sense that it is isomorphic to a cotangent bundle with the canonical symplectic form plus a "magnetic term".

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。

↑