We prove by induction on k that we always have nj = mj for j = 1;:::;k, and V = V11. Vnn 2 T (n1;:::;nk). The statement is clear if k = 1. Assume the statement is true ...
Linear Operators Preserving Generalized Numerical Ranges and Radii on Certain Triangular Algebras of Matrices Wai-Shun Cheung and Chi-Kwong Li
Abstract
Let c = (c ; : : :; cn) be such that c cn. The c-numerical range of an n n matrix A is de ned by 1
