arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0905.4318math.SG
收藏

李群胚上的离散Hamilton-Pontryagin力学和generating functions

Discrete Hamilton-Pontryagin mechanics and generating functions on Lie groupoids

Ari Stern

摘要:

我们提出了一个离散模拟最近引入的哈密顿庞特里亚金变分原理在拉格朗日力学。这统一了两种以前不同的离散拉格朗日力学方法:要么使用离散拉格朗日量来定义有限版本的汉密尔顿作用量原理,要么将其视为辛生成函数。这是证明了一个离散拉格朗日定义在任意李群胚;经常遇到的特殊情况对群胚(或笛卡尔广场)也给出了一个工作的例子。

英文摘要:

We present a discrete analog of the recently introduced Hamilton-Pontryagin variational principle in Lagrangian mechanics. This unifies two, previously disparate approaches to discrete Lagrangian mechanics: either using the discrete Lagrangian to define a finite version of Hamilton's action principle, or treating it as a symplectic generating function. This is demonstrated for a discrete Lagrangian defined on an arbitrary Lie groupoid; the often encountered special case of the pair groupoid (or Cartesian square) is also given as a worked example.

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。

↑