Yj. Yon et Dy. Kwak, NONCONFORMING MULTIGRID METHOD FOR NONSYMMETRIC AND INDEFINITE PROBLEMS, Computers & mathematics with applications, 30(11), 1995, pp. 1-7
The convergence of W-cycle multigrid algorithms applied to nonsymmetri
c and indefinite elliptic boundary value problems using P1 nonconformi
ng finite elements is proved.