%0 Journal Article %A D. J. Evans %A M. Hatzopoylos %T On the Direct Solution of Preconditioned Linear Equations %J Ευκλείδης Γ %D 1987 %P 30-44 %V 16 %I mathdoc %U http://geodesic.mathdoc.fr/item/EUG_1987__16_a4/ %G gr %F EUG_1987__16_a4