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arXiv 0908.0508math-phmath.MP
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Degasperis-Procesi方程作为非度量Euler方程

The Degasperis-Procesi equation as a non-metric Euler equation

Joachim Escher, Boris Kolev

摘要:

本文给出了周期Degasperis-Procesi方程的一个几何解释,它是圆的同态群上的一个右不变对称线性联络的测地线流。我们还表明,对于任何家庭的$b$ -方程的演变既没有增益也没有损失的空间正则性的解决方案。这反过来又允许我们将Degasperis-Procesi和Camassa-Holm方程看作是圆上所有光滑函数的Fréchet空间上的常微分方程。

英文摘要:

In this paper we present a geometric interpretation of the periodic Degasperis-Procesi equation as the geodesic flow of a right invariant symmetric linear connection on the diffeomorphism group of the circle. We also show that for any evolution in the family of $b$-equations there is neither gain nor loss of the spatial regularity of solutions. This in turn allows us to view the Degasperis-Procesi and the Camassa-Holm equation as an ODE on the Fréchet space of all smooth functions on the circle.

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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