%0 Journal Article %A Varga, Richard S. %T Geršgorin-type eigenvalue inclusion theorems and their sharpness %J Electronic transactions on numerical analysis %D 2001 %P 113-133 %V 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/ETNA_2001__12__a6/ %G en %F ETNA_2001__12__a6