AN ALTERNATE PROOF OF THE INFINITE ORDER PERTURBATION THEORY BY MATRIX PARTITION
无限次微扰理论的分块矩阵法证明

Recently, Wu and his coworkers formulated an infinite order perturbation theory for solving the Green's function of a disordered system, using a diagrammatic technique. In this paper, the method of matrix partition is used to obtain the same series of recursion relations, thus providing an algebraic proof for the theory.