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arXiv 1407.0263math-phmath.MP
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场论中一种新的拉格朗日动力学约化

A new Lagrangian dynamic reduction in field theory

François Gay-Balmaz, Tudor S. Ratiu

摘要:

对于主丛上的对称经典场论,对称约化有两种方法:协变方法和动力学方法。假设经典场论由定义在主丛的第一喷丛上的对称协变拉格朗日密度给出。结果表明,协变和动态减少导致等效的运动方程。这是通过构建一个新的拉格朗日定义在一个无限维的空间,原来是规范群不变。

英文摘要:

For symmetric classical field theories on principal bundles there are two methods of symmetry reduction: covariant and dynamic. Assume that the classical field theory is given by a symmetric covariant Lagrangian density defined on the first jet bundle of a principal bundle. It is shown that covariant and dynamic reduction lead to equivalent equations of motion. This is achieved by constructing a new Lagrangian defined on an infinite dimensional space which turns out to be gauge group invariant.

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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