%0 Journal Article %A A. B. Grigorian %T Algebraic multigrid preconditioner for elliptic problems with mixed type boundary conditions II. Multigrid preconditioner %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2006 %P 41-48 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2006_2_a3/ %G ru %F UZERU_2006_2_a3