%0 Journal Article %A Gordon M. Petersen %T The Relationship of Matrix Norms to Matrix Singularities. %J Mathematische Zeitschrift %D 1972 %P 365-369 %V 127 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1972__127_171782/ %F MZ_1972__127_171782