%0 Journal Article %A Zhang, Jun %T On preconditioning Schur complement and Schur complement preconditioning %J Electronic transactions on numerical analysis %D 2000 %P 115-130 %V 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/ETNA_2000__10__a0/ %G en %F ETNA_2000__10__a0