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arXiv 2106.06260math-phhep-thmath.MP
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$k$ -前辛拉格朗日场论的二阶问题。Einstein-Palatini模型

The second-order problem for $k$-presymplectic Lagrangian field theories. Application to the Einstein--Palatini model

David Adame-Carrillo, Jordi Gaset, Narciso Román-Roy

摘要:

一般地说,由经典场论的欧拉-拉格朗日方程组成的$2$阶偏微分方程组对奇异拉格朗日量是不相容的。这就是所谓的二阶问题。这项工作的第一个目的是开发一个完全几何约束算法,使我们能够找到一个子流形的欧拉-拉格朗日方程的解决方案,并分裂成两种约束取决于它们的起源。我们这样做使用$k$ -辛几何,这是最简单的经典场论的内在描述。作为第二个目标,利用该算法研究了广义相对论的Einstein-Palatini模型。

英文摘要:

In general, the system of $2$nd-order partial differential equations made of the Euler-Lagrange equations of classical field theories are not compatible for singular Lagrangians. This is the so-called second-order problem. The first aim of this work is to develop a fully geometric constraint algorithm which allows us to find a submanifold where the Euler-Lagrange equations have solution, and split the constraints into two kinds depending on their origin. We do so using $k$-symplectic geometry, which is the simplest intrinsic description of classical field theories. As a second aim, the Einstein-Palatini model of General Relativity is studied using this algorithm.

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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