Man-duen Choi, John A. Holbrook, David W. Kribs, P. Halmos, D. Van Nostr
Abstract. We verify a conjecture on the structure of higher-rank numerical ranges for a wide class of unitary and normal matrices. Using analytic and geometric techniques, we show precisely how the...
Higher-Rank Numerical Ranges of Unitary and Normal Matrices (2006)
Choi, Man-Duen, Holbrook, John A., Kribs, David W., Zyczkowski, Karol
We verify a conjecture on the structure of higher-rank numerical ranges for a wide class of unitary and normal matrices. Using analytic and geometric techniques, we show precisely how the higher-rank...