Results 181 to 190 of about 11,887 (225)
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On the essential commutant of the Toeplitz algebra on the Bergman space
Journal of Functional Analysis, 2017Jingbo Xia
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Bergman spaces over noncommutative domains and commutant lifting
, 2021The goal of the present paper is to provide analogues of Sarason interpolation theorem in the Hardy algebra H ∞ ( D ) and Sz.Nagy-Foias commutant lifting theorem for contractions on Hilbert spaces in the setting of noncommutative Hardy spaces associated ...
Gelu Popescu
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Hypercyclicity for the Elements of the Commutant of an Operator
Integral Equations and Operator Theory, 2014Manuel González +1 more
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Commutativity and Homotopy-Commutativity
1964The aim of this section is to show, by means of the methods developed in Chapter 3, that for an associative H-space G there exist maps G× G → G satisfying certain commutativity conditions (Theorem 4.5). As will be explained in Remarks 4.6 this result is related to the work of other authors on homotopy-commutativity.
M. Arkowitz, C. R. Curjel
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Commutant Lifting and Nevanlinna–Pick Interpolation in Several Variables
Integral equations and operator theory, 2019This paper concerns a commutant lifting theorem and a Nevanlinna–Pick type interpolation result in the setting of multipliers from vector-valued Drury–Arveson space to a large class of vector-valued reproducing kernel Hilbert spaces over the unit ball in
K. D. Deepak +3 more
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The Mathematical Gazette, 1947
We prove some theorems on commutative involutions in a “real” projective geometry in which cobasal homographie ranges may have 0, 1 or 2 self-corresponding points (and therefore a conic and a general line in its plane have 0, 1 or 2 points of intersection).
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We prove some theorems on commutative involutions in a “real” projective geometry in which cobasal homographie ranges may have 0, 1 or 2 self-corresponding points (and therefore a conic and a general line in its plane have 0, 1 or 2 points of intersection).
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Canadian Journal of Mathematics, 1961
A classical theorem states that if a square matrix B over an algebraically closed field F commutes with all matrices X over F which commute with a matrix A over F, then B must be a polynomial in A with coefficients in F (2). Recently Marcus and Khan (1) generalized this theorem to double commutators.
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A classical theorem states that if a square matrix B over an algebraically closed field F commutes with all matrices X over F which commute with a matrix A over F, then B must be a polynomial in A with coefficients in F (2). Recently Marcus and Khan (1) generalized this theorem to double commutators.
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Commute Replacement and Commute Displacement
Transportation Research Record: Journal of the Transportation Research Board, 2008Working by telecommunication has been the subject of research attention in transportation studies for many years. Particular consideration has been given to occasional working from home (home working) by (full-time, paid) employees who represent a tangible removal of commute trips on days that people work from home.
Glenn Lyons, Hebba Haddad
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Coupling and Relaxed Commutant Lifting
, 2013.A Redheffer type description of the set of all contractive solutions to the relaxed commutant lifting problem is given. The description involves a set of Schur class functions which is obtained by combining the method of isometric coupling with results ...
A. Frazho, S. Horst, M. A. Kaashoek
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On Non-Commutative Algebras and Commutativity Conditions
Results in Mathematics, 1990A theorem of T. Nakayama states that an algebra \(A\) over an \({\mathcal N}\)- ring \(R\) is commutative if \(A\) satisfies the following condition: (N) For each \(x\) in \(A\), there exists \(f(X)\) in \(X^ 2 R[X]\) such that \(x-f(x)\) is central. More generally, W. Streb studied \(R\)-algebras \(A\) satisfying the following condition: (S) For each \
Komatsu, Hiroaki, Tominaga, Hisao
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