The generalized numerical range of a set of matrices

Pan-Shun Lau, Chi-Kwong Li, Yiu-Tung Poon +1

For a given set of $n\times n$ matrices $\mathcal{F}$, we study the union of the $C$-numerical ranges of the matrices in the set $\mathcal{F}$, denoted by $W_C(\mathcal{F})$. We obt…