%0 Journal Article
%A Elias A. Lipitakis
%A  George A. Gravvanis
%T The Convergence rate and Complexity of Precondotioned Iterative methods based on Approximate finite Element matrix Factorization
%J Μαθηματική Επιθεώρηση

%D 1987
%P 11-23
%V 33
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MR_1987__33_a1/
%G gr
%F MR_1987__33_a1