%0 Journal Article %A Knyazev, Andrew V. %A Neymeyr, Klaus %T Efficient solution of symmetric eigenvalue problems using multigrid preconditioners in the locally optimal block conjugate gradient method %J Electronic transactions on numerical analysis %D 2003 %P 38-55 %V 15 %I mathdoc %U http://geodesic.mathdoc.fr/item/ETNA_2003__15__a11/ %G en %F ETNA_2003__15__a11