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arXiv math-ph/0406003math-phmath.MP
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Lax单域算子的协变形式

Covariant forms of Lax one-field operators

Leble sergey

摘要:

微分算子中的多项式被认为是。达布变换协方差确定非阿贝尔项以形成多项式的系数。研究了一对这样的多项式(拉克斯对)作为单场函数的联合协方差。系统地,系数的变换被均衡为Frechet导数(延长空间上的泰勒级数的第一项)以建立算子形式。在交换(阿贝尔)的情况下,结果在二进制贝尔(Faa德布鲁诺)微分多项式具有自然的双线性表示。以广义Boussinesq方程为例,导出了该情形的链式方程.一组可积的非对易势,从而非线性方程的构造与显式敷料公式。

英文摘要:

Polynomials in differentiation operators are considered. The Darboux transformations covariance determines non-Abelian entries to form the coefficients of the polynomials. Joint covariance of a pair of such polynomials (Lax pair) as a function of one-field is studied. Methodically, the transforms of the coefficients are equalized to Frechet derivatives (first term of the Taylor series on prolonged space) to establish the operator forms. In the commutative (Abelian) case that results in binary Bell (Faa de Bruno) differential polynomials having natural bilinear representation. The example of generalized Boussinesq equation is studied, the chain equations for the case are derived. A set of integrable non-commutative potentials and hence nonlinear equations is constructed altogether with explicit dressing formulas.

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