منابع مشابه
Multiplicative maps preserving the higher rank numerical ranges and radii
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: Annals of Functional Analysis
سال: 2012
ISSN: 2008-8752
DOI: 10.15352/afa/1399900027