%0 Journal Article %A James Weldon Demmel %T On Condition Numbers and the Distance to the Nearest Ill-posed Problem. %J Numerische Mathematik %D 1987 %P 251-290 %V 51 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1987__51_133195/ %F NUMA_1987__51_133195