TY - JOUR AU - Oswald, P. AU - Griebel, M. TI - On additive scharz preconditioners for sparse grid discretizations. JO - Numerische Mathematik PY - 1993/94 VL - 66 IS - 4 SP - 449 EP - 464 KW - Poisson equation; elliptic equations; finite elements; preconditioned iterative methods; sparse grids; BPX; hierarchical basis; subspace splitting; additive Schwarz scheme; condition number; multilevel preconditioners UR - http://eudml.org/doc/133772 ER -