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arXiv math/9312213math.SGmath.DG
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李群或主丛余切丛上的Poisson结构及其约化

Poisson structures on the cotangent bundle of a Lie group or a principal bundle and their reductions

Dmitri V. Alekseevsky, Janusz Grabowski, Giuseppe Marmo, Peter W. Michor

摘要:

在李群$G$的余切丛$T\sp*G$上,人们可以用右Maurer-Cartan形式和左矩映射($G$对自身的右作用),也可以用左Maurer-Cartan形式和右矩映射来描述标准Liouville形式$θ$和辛形式$d θ$,泊松结构也可以用相关的量来表示。这就导致了$T\sp*G$上的一大类精确辛结构,并通过将$G$对自身的右或左作用的正则动量替换为任意的正则动量,然后进行约化(例如,约化为穿过Weyl腔的$G$),从而导致了泊松结构。这种方法也适用于主丛。

英文摘要:

On a cotangent bundle $T\sp*G$ of a Lie group $G$ one can describe the standard Liouville form $θ$ and the symplectic form $d θ$ in terms of the right Maurer Cartan form and the left moment mapping (of the right action of $G$ on itself), and also in terms of the left Maurer-Cartan form and the right moment mapping, and also the Poisson structure can be written in related quantities. This leads to a wide class of exact symplectic stuctures on $T\sp*G$ and to Poisson structures by replacing the canonical momenta of the right or left actions of $G$ on itself by arbitrary ones, followed by reduction (to $G$ cross a Weyl-chamber, e.g.). This method also works on principal bundles.

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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