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arXiv 0709.3704math-phmath.MP
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格点势KdV方程的多尺度展开和可积性

Multiscale expansion and integrability properties of the lattice potential KdV equation

Rafael Hernandez Heredero, Decio Levi, Matteo Petrera, Christian Scimiterna

摘要:

我们应用离散多尺度展开的拉克斯对和晶格势Korteweg-de Vries方程的前几个对称性。从这些计算中,我们发现,像最低阶的世俗性条件给出一个非线性Schroedinger方程一样,拉克斯对在相同的阶上给出了Zakharov和Shabat谱问题,对称性给出了非线性Schroedinger方程的点族和广义对称性.

英文摘要:

We apply the discrete multiscale expansion to the Lax pair and to the first few symmetries of the lattice potential Korteweg-de Vries equation. From these calculations we show that, like the lowest order secularity conditions give a nonlinear Schroedinger equation, the Lax pair gives at the same order the Zakharov and Shabat spectral problem and the symmetries the hierarchy of point and generalized symmetries of the nonlinear Schroedinger equation.

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