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arXiv 2107.07280nlin.SImath-phmath.MPmath.RA
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关于Lax算子

On Lax operators

Alberto De Sole, Victor G. Kac, Daniele Valeri

摘要:

我们定义一个Lax算子为一个阶为$N\geq 1$的一元论伪微分算子$L(\partial)$,使得Lax方程$\dfrac{\partial L(\partial)}{\partial t_k}=[(L^{\frac kN}(\partial))_+,L(\partial)]$对无穷多个正整数$k$是相容的且非零的.一个方程的相容性意味着它的流是由一个演化向量场定义的。本文证明了KP和$N$阶KdV族的传统理论对任意标量Lax算子都成立。

英文摘要:

We define a Lax operator as a monic pseudodifferential operator $L(\partial)$ of order $N\geq 1$, such that the Lax equations $\dfrac{\partial L(\partial)}{\partial t_k}=[(L^{\frac kN}(\partial))_+,L(\partial)]$ are consistent and non-zero for infinitely many positive integers $k$. Consistency of an equation means that its flow is defined by an evolutionary vector field. In the present paper we demonstrate that the traditional theory of the KP and the $N$-th KdV hierarchies holds for arbitrary scalar Lax operators.

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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