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arXiv 1607.00752math-phcs.NAmath.MPmath.NAnlin.SI
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对微分差方程的对称性、守恒律和诺特定理的研究

Symmetries, conservation laws and Noether's theorem for differential-difference equations

Waseda University(早稻田大学)

Linyu Peng

AI总结:

本文致力于将诺特定理扩展到微分差方程中,通过研究连续对称性的延拓公式,探讨了对称性、守恒律与弗雷歇导数之间的关系,并利用自共轭方法计算微分差方程的守恒律,以Toda晶格和KdV方程的半离散化为例进行了说明。

摘要:

本文主要致力于将诺特定理扩展到微分差方程中。为此,我们首先研究了连续对称性的延拓公式,这使得特征表示成为可能。还研究了对称性、守恒律与弗雷歇导数之间的关系。对于非变分方程,由于现在可以应用诺特定理,因此采用自共轭方法来计算微分差方程的守恒律。通过几个微分差方程进行说明,包括Toda晶格和Korteweg-de Vries (KdV)方程的半离散化。特别是,Volterra方程被作为示例进行研究。

英文摘要:

This paper mainly contributes to the extension of Noether's theorem to differential-difference equations. For that purpose, we first investigate the prolongation formula for continuous symmetries, which makes a characteristic representation possible. The relations of symmetries, conservation laws and the Fréchet derivative are also investigated. For non-variational equations, since Noether's theorem is now available, the self-adjointness method is adapted to the computation of conservation laws for differential-difference equations. A couple of differential-difference equations are investigated as illustrative examples, including the Toda lattice and semi-discretisations of the Korteweg-de Vries (KdV) equation. In particular, the Volterra equation is taken as a running example.

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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