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arXiv math-ph/0507061math-phmath.MPnlin.SI
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保持物理对称性的偏微分方程离散化

Discretization of partial differential equations preserving their physical symmetries

Francis Valiquette, Pavel Winternitz

摘要:

本文给出了一个保持偏微分方程所有李点对称性的“最小”离散化方法。在这种情况下,“最小”意味着微分方程被包括N个差分方程的偏差分格式所取代,其中N是自变量和因变量的数量。我们限制为两个独立变量的一个标量函数。作为例子,不变离散的热量,Burgers和Korteweg-de Vries方程。得到了离散格式的一些精确解。

英文摘要:

A procedure for obtaining a "minimal" discretization of a partial differential equation, preserving all of its Lie point symmetries is presented. "Minimal" in this case means that the differential equation is replaced by a partial difference scheme involving N difference equations, where N is the number of independent and dependent variable. We restrict to one scalar function of two independent variables. As examples, invariant discretizations of the heat, Burgers and Korteweg-de Vries equations are presented. Some exact solutions of the discrete schemes are obtained.

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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