On （2＋1）-Dimensional Non-isospectral Toda Lattice Hierarchy and Integrable Coupling System

摘要

By considering (2+1)-dimensional non-isospectral discrete zero curvature equation,the (2+1)-dimensional non-isospectral Toda lattice hierarchy is constructed in this article.It follows that some reductions of the (2+1)- dimensional Toda lattice hierarchy are given.Finally,the (2+1)-dimensional integrable coupling system of the Toda lattice hierarchy is obtained through enlarging spectral problem.