On the nonnegativity of operator products

DOI10.1007/s10474-005-0231-xzbMath1105.47003OpenAlexW2122438524MaRDI QIDQ2368558

Hassi, Seppo, Hendrik S. V. de Snoo, Zoltán Sebestyén

Publication date: 5 October 2006

Published in: Acta Mathematica Hungarica (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/s10474-005-0231-x

zbMATH Keywords

selfadjoint operatorsymmetric operatorFriedrichs extensionproduct of operatorsKreĭn-von Neumann extensionnonnegative operator

Mathematics Subject Classification ID

Hermitian and normal operators (spectral measures, functional calculus, etc.) (47B15) Spectrum, resolvent (47A10) Linear symmetric and selfadjoint operators (unbounded) (47B25) General (adjoints, conjugates, products, inverses, domains, ranges, etc.) (47A05) Positive linear operators and order-bounded operators (47B65)

Related Items (14)

Joint numerical ranges of operators in semi-Hilbertian spaces ⋮ Products of positive operators ⋮ Operator norm inequalities in semi-Hilbertian spaces ⋮ Operators on anti‐dual pairs: Generalized Krein–von Neumann extension ⋮ (A, m)-partial isometries in semi-Hilbertian spaces ⋮ The transmission problem on a three-dimensional wedge ⋮ On products of nonnegative linear operators and relations ⋮ A canonical decomposition for linear operators and linear relations ⋮ Ergodic properties of operators in some semi-Hilbertian spaces ⋮ Partial isometries in semi-Hilbertian spaces ⋮ Positive decompositions of selfadjoint operators ⋮ Joint normality of operators in semi-Hilbertian spaces ⋮ Davis-Wielandt shells of semi-Hilbertian space operators and its applications ⋮ Congruence of selfadjoint operators

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