%0 Journal Article %A Mihaela Negreanu %A Enrique Zuazua %T Convergence of a multigrid method for the controllability of a 1-d wave equation %J Comptes Rendus. Mathématique %D 2004 %P 413-418 %V 338 %N 5 %I Elsevier %R 10.1016/j.crma.2003.11.032 %G en %F CRMATH_2004__338_5_413_0