Cascadic Multigrid Method for Parabolic Problems in Domains with Re-entrant Corners

This paper proposed a cascadic multigrid(CMG) method for parabolic problems in domains with re-entrant corners,whose corresponding convergent results were obtained.The results show that the iterative solution of the CMG method has the same steps as the discrete solution at any time step,i.e.of O(h_l),and its number of arithmetic operations is of O(h_l).