Operators and Matrices · Volume 13, Issue 4 Constant norms and numerical radii of matrix powers 13-72 Pages 1035-1054 DOI 10.7153/oam-2019-13-72 Downloads Short PDF Full PDF PNG Authors Hwa-Long Gau Kuo-Zhong Wang Pei Yuan Wu Keywords operator norm numerical range idempotent matrix irreducible matrix Subject classes 15A60 47A12 47A30