%0 Journal Article %A Li, Chi-Kwong %A Poon, Edward %A Rastogi, Ashwin %T Maps preserving spectral radius, numerical radius, spectral norm %J The electronic journal of linear algebra %D 2007 %P 347-365 %V 16 %I mathdoc %U http://geodesic.mathdoc.fr/item/ELA_2007__16__a8/ %G en %F ELA_2007__16__a8