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arXiv 1409.4340math-phcs.NAmath.MPmath.NA
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Korteweg-de Vries方程及其对称保持离散化

The Korteweg-de Vries equation and its symmetry-preserving discretization

Memorial University of Newfoundland(纽芬兰纪念大学);Université de Montréal(蒙特利尔大学)

Alexander Bihlo, Xavier Coiteux-Roy, Pavel Winternitz

AI总结:

本文研究了Korteweg-de Vries方程的拉格朗日和欧拉形式下的不变离散化方案,并提出保持动量的不变方案,通过数值测试发现这些方案在精度上与标准方案相当,且能保持伽利略变换。

摘要:

Korteweg-de Vries方程是数学科学中最重要的非线性演化方程之一。本文为此方程构造了拉格朗日和欧拉形式下的不变离散化方案,并提出了保持动量的不变方案。对所有不变离散化方案进行了数值测试,并与标准数值方案进行了比较。发现不变离散化方案通常与标准方案具有相同的精度,但具有保持伽利略变换的优势,这一点也通过数值实验得到了验证。

英文摘要:

The Korteweg-de Vries equation is one of the most important nonlinear evolution equations in the mathematical sciences. In this article invariant discretization schemes are constructed for this equation both in the Lagrangian and in the Eulerian form. We also propose invariant schemes that preserve the momentum. Numerical tests are carried out for all invariant discretization schemes and related to standard numerical schemes. We find that the invariant discretization schemes give generally the same level of accuracy as the standard schemes with the added benefit of preserving Galilean transformations which is demonstrated numerically as well.

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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