Preface of the special issue on Numerical ranges and numerical radii
نویسندگان
چکیده
The study of the numerical range, radius, and their generalizations has a long extensive history. Much impetus for high level activity is connections application...
منابع مشابه
The Ninth Workshop on Numerical Ranges and Numerical Radii
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Let Mn be the semigroup of n× n complex matrices under the usual multiplication, and let S be different subgroups or semigroups in Mn including the (special) unitary group, (special) general linear group, the semigroups of matrices with bounded ranks. Suppose Λk(A) is the rank-k numerical range and rk(A) is the rank-k numerical radius of A ∈ Mn. Multiplicative maps φ : S → Mn satisfying rk(φ(A)...
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ژورنال
عنوان ژورنال: Linear & Multilinear Algebra
سال: 2021
ISSN: ['0308-1087', '1026-7573', '1563-5139']
DOI: https://doi.org/10.1080/03081087.2020.1853014