arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1104.4026cs.SCmath-phmath.MPnlin.SI
收藏

非线性微分差分方程递归算子的符号计算

Symbolic Computation of Recursion Operators for Nonlinear Differential-Difference equations

Ünal Göktaş, Willy Hereman

摘要:

提出了一种非线性微分差分方程组递归算子的符号计算算法。递归算子允许我们生成一个无限的广义对称序列。因此,递归算子的存在保证了DDE的完全可积性。该算法部分地基于伸缩不变性的概念,并使用我们以前的守恒律和广义对称性的符号计算算法。该算法已被应用到一些著名的DDE,包括Kac-van Moerbeke(Volterra),户田,和Ablowitz-Ladik格,其中递归算子显示。该算法已在著名的计算机代数系统Mathematica中实现。简要讨论了DDERecursionOperator.m包。

英文摘要:

An algorithm for the symbolic computation of recursion operators for systems of nonlinear differential-difference equations (DDEs) is presented. Recursion operators allow one to generate an infinite sequence of generalized symmetries. The existence of a recursion operator therefore guarantees the complete integrability of the DDE. The algo-rithm is based in part on the concept of dilation invariance and uses our earlier algorithms for the symbolic computation of conservation laws and generalized symmetries. The algorithm has been applied to a number of well-known DDEs, including the Kac-van Moerbeke (Volterra), Toda, and Ablowitz-Ladik lattices, for which recursion opera-tors are shown. The algorithm has been implemented in Mathematica, a leading com-puter algebra system. The package DDERecursionOperator.m is briefly discussed.

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。

↑