为了获得非线性差分微分方程的无穷序列精确解,引入一种双曲函数型辅助方程,并给出该方程解的Bcklund变换和解的非线性叠加公式.在此基础上,利用辅助方程与函数变换相结合的方法,借助符号计算系统Mathematica,用一般格子方程为应用实例,获得了无穷序列精确解。
To seek infinite sequence exact solutions to nonlinear difference-differential equations,a kind of auxiliary equation of hyperbolic function type is intruduced,and the Bcklund transformation of the solutions to the equation and the formula of nonlinear supperposition of solutions are presented.Based on these and combing auxiliary equation with function transformation,the general lattice equation is chosen as example for which the infinite sequence exact solutionsto the equation are obtained.