%0 Journal Article %A Kui Du %D 2010 %J International Journal of Mathematical and Computational Sciences %B World Academy of Science, Engineering and Technology %I Open Science Index 44, 2010 %T The Ratios between the Spectral Norm, the Numerical Radius and the Spectral Radius %U https://publications.waset.org/pdf/11448 %V 44 %X Recently, Uhlig [Numer. Algorithms, 52(3):335-353, 2009] proposed open questions about the ratios between the spectral norm, the numerical radius and the spectral radius of a square matrix. In this note, we provide some observations to answer these questions. %P 1113 - 1116