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arXiv 1009.3261math.APmath-phmath.MP
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欠定微分方程组的守恒律

Conservation laws for under determined systems of differential equations

Mahouton Norbert Hounkonnou, Pascal Dkengne Sielenou

摘要:

这项工作扩展了Algimov的守恒定理偏微分方程[{ \it J.数学。分析。333(2007 311-328)]中所描述的方法。定义了方程数等于或小于因变量数的微分方程组的伴随方程和形式拉格朗日量的概念。证明了由一个方程及其伴随方程给出的系统与一个变分问题(有或没有经典拉格朗日量)相关联,并继承了原方程的所有李点和广义对称性.相应地,守恒律的Noether定理可以被公式化。

英文摘要:

This work extends the Ibragimov's conservation theorem for partial differential equations [{\it J. Math. Anal. Appl. 333 (2007 311-328}] to under determined systems of differential equations. The concepts of adjoint equation and formal Lagrangian for a system of differential equations whose the number of equations is equal to or lower than the number of dependent variables are defined. It is proved that the system given by an equation and its adjoint is associated with a variational problem (with or without classical Lagrangian) and inherits all Lie-point and generalized symmetries from the original equation. Accordingly, a Noether theorem for conservation laws can be formulated.

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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