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arXiv math-ph/9805002math-phmath.MP
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一种扩展的Hamilton形式

A time-extended Hamiltonian formalism

Hasan Gumral

摘要:

一个泊松结构的时间扩展空间R × M是适当的哈密顿形式主义,其中时间不再是一个特权变量,没有先验几何假设的运动空间M。可能的几何形状上诱导的空间域M进行了研究。本文给出了sl(2,R)代数的一个抽象表示空间,并给出了具体的Darboux-Hegenen系统的物理实现.证明了R × M上的Poisson双向量具有两个内在无穷小自同构,其中之一称为模向量场或旋度向量场。锚定到这两个,可以生成无限层次的自同构。讨论了哈密顿动力系统对称结构的意义。作为接触流与其辛构之间同构的推广,对于不可压缩流体的三维运动,证明了R × M上的Hamilton流与M上保持几何结构的无穷小运动之间的关系.

英文摘要:

A Poisson structure on the time-extended space R x M is shown to be appropriate for a Hamiltonian formalism in which time is no more a privileged variable and no a priori geometry is assumed on the space M of motions. Possible geometries induced on the spatial domain M are investigated. An abstract representation space for sl(2,R) algebra with a concrete physical realization by the Darboux-Halphen system is considered for demonstration. The Poisson bi-vector on R x M is shown to possess two intrinsic infinitesimal automorphisms one of which is known as the modular or curl vector field. Anchored to these two, an infinite hierarchy of automorphisms can be generated. Implications on the symmetry structure of Hamiltonian dynamical systems are discussed. As a generalization of the isomorphism between contact flows and their symplectifications, the relation between Hamiltonian flows on R x M and infinitesimal motions on M preserving a geometric structure therein is demonstrated for volume preserving diffeomorphisms in connection with three-dimensional motion of an incompressible fluid.

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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