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@article{MZ_1972__127_171782, author = {Gordon M. Petersen}, title = {The {Relationship} of {Matrix} {Norms} to {Matrix} {Singularities.}}, journal = {Mathematische Zeitschrift}, pages = {365--369}, publisher = {mathdoc}, volume = {127}, year = {1972}, zbl = {0254.40004}, url = {http://geodesic.mathdoc.fr/item/MZ_1972__127_171782/} }
Gordon M. Petersen. The Relationship of Matrix Norms to Matrix Singularities.. Mathematische Zeitschrift, Tome 127 (1972), pp. 365-369. http://geodesic.mathdoc.fr/item/MZ_1972__127_171782/