%0 Journal Article %A D. Braess %T The Contraction Number of a Multigrid Method for Solving the Poisson Equation. %J Numerische Mathematik %D 1981 %P 387-404 %V 37 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1981__37_132739/ %F NUMA_1981__37_132739