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arXiv 0710.5299math-phmath.MPnlin.SI
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格点上的多尺度展开与偏差分方程的可积性

Multiscale expansion on the lattice and integrability of partial difference equations

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

摘要:

利用离散多尺度分析,我们猜想了色散Z^2-格点方程的可积性和可线性化性的一个检验。由多尺度展开得到的最低阶世俗性条件给出了一个非线性薛定谔方程形式的偏微分方程。如果起始格点方程是可积的,那么所得到的NLS方程也是可积的,而如果起始方程是可线性化的,我们得到线性薛定谔方程。另一方面,如果我们从一个不可积的格方程出发,我们可以得到一个不可积的NLS方程。这个猜想被许多例子所证实。

英文摘要:

We conjecture an integrability and linearizability test for dispersive Z^2-lattice equations by using a discrete multiscale analysis. The lowest order secularity conditions from the multiscale expansion give a partial differential equation of the form of the nonlinear Schrodinger (NLS) equation. If the starting lattice equation is integrable then the resulting NLS equation turns out to be integrable, while if the starting equation is linearizable we get a linear Schrodinger equation. On the other hand, if we start with a non-integrable lattice equation we may obtain a non-integrable NLS equation. This conjecture is confirmed by many examples.

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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