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arXiv 2101.10282nlin.SImath-phmath.MP
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一类2+1维可积Hamilton方程

On a class of integrable Hamiltonian equations in 2+1 dimensions

B. Gormley, E. V. Ferapontov, V. S. Novikov

摘要:

我们用Hamilton算子d/dx对三维可积Hamilton方程进行了分类,其中Hamilton密度h(u,w)是两个变量的函数:因变量u和非定域性w,使得w_x=u_y.基于流体动力学约化的方法,导出了可积性条件(以哈密顿密度h的对合PDE系统的形式)。我们表明,一般的可积密度表示的Weierstrass椭圆函数。讨论了无色散的拉克斯对、交换流和色散变形.

英文摘要:

We classify integrable Hamiltonian equations in 3D with the Hamiltonian operator d/dx, where the Hamiltonian density h(u, w) is a function of two variables: dependent variable u and the non-locality w such that w_x=u_y. Based on the method of hydrodynamic reductions, the integrability conditions are derived (in the form of an involutive PDE system for the Hamiltonian density h). We show that the generic integrable density is expressed in terms of the Weierstrass elliptic functions. Dispersionless Lax pairs, commuting flows and dispersive deformations of the resulting equations are also discussed.

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