Toda -like 晶格方程的条件对称

摘要

In this paper , the discrete Lie point symmetry group analysis method is applied on the ( 1+1 ) dimensional nonlinear differential -difference Toda-like equation, i.e.firstly, the conditional symmetries is in-troduced, after that the overdetermined equations are solved , and then similarity reduction for the equation is done , and the new exact solutions of this equation are obtained .%把离散的Lie点对称群分析方法应用于（1＋1）维非线性微分-差分Toda-like方程，即首先引入条件对称，之后解相应的超定方程组，进而对该方程进行了相似约化，得到了方程的新的精确解。