AbstractA necessary and sufficient condition for a Hermitian operator on a Hilbert space to be expressed as aP + bQ with some projections P, Q and reals a, b is established. Moreover the spectrum of such an operator is explicitly drawn in terms of the spectrum of PQ ∣ran P, the restriction to the range of P
Following an introductory chapter on constructive mathematics, Chapter 2 contains a detailed constru...
AbstractFor a bounded linear operator M in a Hilbert space H, various relations among the ranges R(M...
AbstractLet B(H) denote the algebra of operators on a Hilbert space H, and let ϕ∈B(B(H)) be the elem...
AbstractA necessary and sufficient condition for a Hermitian operator on a Hilbert space to be expre...
AbstractThe behavior of operators which are both scalar-type spectral and Hermitian (and this includ...
AbstractLet Cn×n and Hn denote respectively the space of n×n complex matrices and the real space of ...
In the setting of various complex Banach spaces we consider the questions of when a square of a Herm...
Abstract. Given Hilbert space operators A and B, the possible spectra of operators of the form A-BF ...
[[abstract]]Let and denote respectively the space of n×n complex matrices and the real space of n×...
Given a complex, separable Hilbert space H, we characterize those operators for which kP T(I − P)k =...
AbstractAny Hermitian matrix A is a linear combination of four projections. The number of projection...
If H is a Hilbert space, A is a positive bounded linear operator on H and S is a closed subspace of ...
Each bounded linear operator a on a Hilbert space K has a hermitian left-support projection p such ...
AbstractWe give a criterion for the intersection of two projections in Hilbert space to be a project...
AbstractWe establish new connections between the range of a positive semidefinite matrix and its exp...
Following an introductory chapter on constructive mathematics, Chapter 2 contains a detailed constru...
AbstractFor a bounded linear operator M in a Hilbert space H, various relations among the ranges R(M...
AbstractLet B(H) denote the algebra of operators on a Hilbert space H, and let ϕ∈B(B(H)) be the elem...
AbstractA necessary and sufficient condition for a Hermitian operator on a Hilbert space to be expre...
AbstractThe behavior of operators which are both scalar-type spectral and Hermitian (and this includ...
AbstractLet Cn×n and Hn denote respectively the space of n×n complex matrices and the real space of ...
In the setting of various complex Banach spaces we consider the questions of when a square of a Herm...
Abstract. Given Hilbert space operators A and B, the possible spectra of operators of the form A-BF ...
[[abstract]]Let and denote respectively the space of n×n complex matrices and the real space of n×...
Given a complex, separable Hilbert space H, we characterize those operators for which kP T(I − P)k =...
AbstractAny Hermitian matrix A is a linear combination of four projections. The number of projection...
If H is a Hilbert space, A is a positive bounded linear operator on H and S is a closed subspace of ...
Each bounded linear operator a on a Hilbert space K has a hermitian left-support projection p such ...
AbstractWe give a criterion for the intersection of two projections in Hilbert space to be a project...
AbstractWe establish new connections between the range of a positive semidefinite matrix and its exp...
Following an introductory chapter on constructive mathematics, Chapter 2 contains a detailed constru...
AbstractFor a bounded linear operator M in a Hilbert space H, various relations among the ranges R(M...
AbstractLet B(H) denote the algebra of operators on a Hilbert space H, and let ϕ∈B(B(H)) be the elem...
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