SINGULAR VALUE DECOMPOSITION NORMALLY ESTIMATED GER SGORIN SETS
Natacha Fontes, Janice Kover, Laura Smithies, Richard S. Varga · 2007
Let denote a nite-dimensional square complex matrix, and let denote a x ed singular value decomposition (SVD) of . In this note, we follow up work from Smithies and Varga (Linear Algebra Appl., 417 (2006), pp. 370n380), by dening the SV-normal estimator , (which satises ), and showing how it denes an upper bound on the norm, , of the commutant