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Quaternionic essential numerical range of complex operators

open access: green
Luís Carvalho   +3 more
openalex   +2 more sources

The numerical range and decomposable numerical range of matrices

Linear and Multilinear Algebra, 1991
Let m and n be positive integers such that 1≤m≤n. Denote by the set of all n×m complex matrices. For a matrix , the mth decomposable numerical range of A is the set When m=1, it reduces to the classical numerical range of A which is denoted by W(A). It is known that is contaned in W(Cm (A)), where Cm (A) is the mth compound of A. In this paper we study
Natália Bebiano   +2 more
openaire   +1 more source

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