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arXiv 1002.1565math-phhep-thmath.MPphysics.class-phquant-ph
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广义对偶、Hamilton形式和新括号

Generalized duality, Hamiltonian formalism and new brackets

Steven Duplij

摘要:

结果表明:1)通过引入Hamilton形式的Clairaut型形式,任何奇异Lagrange理论都可以在不使用约束条件的情况下得到形式化; 2)导出一种特殊的非交换规范理论,它类似于Poisson规范理论; 3)可以看作是多时间经典动力学.广义的勒让德变换的零海森的情况下,通过使用多维克莱罗方程的混合(信封/一般)的解决方案。相应的运动方程组是等效的拉格朗日方程,并有一个线性代数子系统的“未解决的”速度。然后通过引入新的反对称括号将运动方程写成类Hamilton形式。这是一个“缩短”的形式主义,因为它根本不包含“非动力学”(简并)动量,因此没有约束的概念。指出任何经典的退化拉格朗日理论(在其克莱洛型哈密顿形式下)都等价于多时间经典动力学。最后,给出了约束系统的Dirac方法和所提出的形式之间的关系。

英文摘要:

It is shown that any singular Lagrangian theory: 1) can be formulated without the use of constraints by introducing a Clairaut-type version of the Hamiltonian formalism; 2) leads to a special kind of nonabelian gauge theory which is similar to the Poisson gauge theory; 3) can be treated as the many-time classical dynamics. A generalization of the Legendre transform to the zero Hessian case is done by using the mixed (envelope/general) solution of the multidimensional Clairaut equation. The corresponding system of motion equations is equivalent to the Lagrange equations and has a linear algebraic subsystem for "unresolved" velocities. Then the equations of motion are written in the Hamilton-like form by introducing new antisymmetric brackets. This is a "shortened" formalism, since it does not contain the "nondynamical" (degenerate) momenta at all, and therefore there is no notion of constraint. It is outlined that any classical degenerate Lagrangian theory (in its Clairaut-type Hamiltonian form) is equivalent to the many-time classical dynamics. Finally, the relation between the presented formalism and the Dirac approach to constrained systems is given.

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