The multi-component Yang hierarchy and its multi-component integrable coupling system with two arbitrary functions

A new simple loop algebra is constructed, which is devoted to establishing an isospectral problem. By making use of Tu scheme, the multi-component Yang hierarchy is obtained. Furthermore, an expanding loop algebra of the loop algebra is presented. Based on , the multi-component integrable coupling system with two arbitrary functions of the multi-component Yang hierarchy is worked out. The method can be applied to other nonlinear evolution equations hierarchy.