Results 41 to 50 of about 185 (65)
A subnormal Toeplitz completion
, 2016 In this paper we deal with a subnormal Toeplitz completion problem: Complete the unspecified Toeplitz operators of the partial block Toeplitz matrix G := [ U∗p ? ? U∗q ] (p,q = 1,2, · · ·) to make G subnormal, where U is the shift on the Hardy space H2(T)
I. Hwang, An-Hyun Kim, Jongrak Lee
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Harmonic analysis on the quantized Riemann sphere
, 1993 International Journal of Mathematics and Mathematical Sciences, Volume 16, Issue 2, Page 225-243, 1993.
Jaak Peetre, Genkai Zhang
wiley +1 more source
Factorization of some triangular matrix functions and its applications
, 2015 We consider defined on the real line R matrix functions with monomial terms of the form ceiλx on the main diagonal and one row, and with zero entries elsewhere.
Y. Karlovich +2 more
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, 2011 We characterize the essential spectra of Toeplitz operators Ta on weighted Bergman spaces with matrix-valued symbols; in particular we deal with two classes of symbols, the Douglas algebra C+H∞ and the Zhu class Q := L∞ ∩VMO∂ . In addition, for symbols
A. Perälä, J. Virtanen
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, 2011 In this paper we use analytical methods for boundary integral operators (more precisely, pseudodifferential operators) together with symmetry arguments in order to treat harmonic wave diffraction problems in which the field does not depend on the third ...
T. Ehrhardt, A. P. Nolasco, F. Speck
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Commuting of block dual Toeplitz operators
, 2014 In this paper, we characterize the commuting (semi-commuting) and the essentially commuting (semi-commuting) of block dual Toeplitz operators. Mathematics subject classification (2010): 47B35, 47B47.
Bo Zhang, Yufeng Lu
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Hyponormality on a weighted Bergman space of an annulus with a general harmonic symbol
Open MathematicsIn this work we consider the hyponormality of Toeplitz operators on the Bergman space of the annulus with a logarithmic weight. We give necessary conditions when the symbol is of the form φ+ψ̄ $\varphi +\bar{\psi }$ where both φ and ψ are analytic on ...
Sadraoui Houcine, Halouani Borhen
doaj +1 more source
Commutants of the sum of two quasihomogeneous Toeplitz operators
Concrete OperatorsA major open question in the theory of Toeplitz operator on the Bergman space of the unit disk of the complex plane is the complete characterization of the set of all Toeplitz operators that commute with a given operator.
Bouhali Aissa, Louhichi Issam
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Toeplitz-type operators in weighted Morrey spaces
, 2013 Let Tj,1 and Tj,2 be singular integrals with non-smooth kernels, which are associated with an approximation of identity or ±I (I is the identity operator). Denote the Toeplitz-type operator by Tb=∑j=1NTj,1MbTj,2, where Mbf(x)=b(x)f(x). In this paper, the
Peizhu Xie, G. Cao
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Iwanami Studies in Advanced Mathematics Hilbert Spaces of Analytic Functions Takahiko Nakazi Professor (Emeritus) of Hokkaido University Mathematical Subject Classification (2000): Primary 46E22; Secondary 47A15, 47B35, 60G10identifier:北海学園大学学園論集 identifier:03857271 identifier:http://hokuga.hgu.jp/dspace/handle/123456789 ...
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