M HAMIDI - Department of matematics, Faculty of Sciences, University of Shiraz, Iran
M FARJOOD

This paper has dealt with the multilevel preconditioning methods based on the recursi ve used of a 2*2 block incomplete factorization procedure in which the Schur complement is approximated by a coarse grid matrix. It has shown that how the successful development of a multgrid and hierarchical basis method prompted the introduction of equivalent algebric technique. Some numerical results of these methods with two problems will be examined.

Interative method for linear systems, Multigrid methods