Results 11 to 20 of about 64 (61)

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, 60G10 [PDF]

open access: yesIwanami 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, 60G10
identifier:北海学園大学学園論集 identifier:03857271 identifier:http://hokuga.hgu.jp/dspace/handle/123456789 ...
YAMAMOTO, Takanori
openaire   +2 more sources

Iwanami Studies in Advanced Mathematics Hilbert Spaces of Analytic Functions (2)  Takahiko Nakazi Professor (Emeritus) of Hokkaido University Mathematical Subject Classification (2000): Primary 46E22; Secondary 47A15, 47B35, 60G10 First published in 2009 in Japanese as Seisoku Kansu no nasu Hiruberuto kukan by Iwanami Shoten, Publishers, Tokyo. [PDF]

open access: yesIwanami Studies in Advanced Mathematics Hilbert Spaces of Analytic Functions (2)  Takahiko Nakazi Professor (Emeritus) of Hokkaido University Mathematical Subject Classification (2000): Primary 46E22; Secondary 47A15, 47B35, 60G10 First published in 2009 in Japanese as Seisoku Kansu no nasu Hiruberuto kukan by Iwanami Shoten, Publishers, Tokyo.
identifier:北海学園大学学園論集 identifier:03857271 identifier:http://hokuga.hgu.jp/dspace/handle/123456789 ...
YAMAMOTO, Takanori
openaire   +2 more sources

Functions of self‐adjoint operators in ideals of compact operators

open access: yesJournal of the London Mathematical Society, Volume 95, Issue 1, Page 157-176, February 2017., 2017
Abstract For self‐adjoint operators A,B, a bounded operator J, and a function f:R→C, we obtain bounds in quasi‐normed ideals of compact operators for the difference f(A)J−Jf(B) in terms of the operator AJ−JB. The focus is on functions f that are smooth everywhere except for finitely many points. A typical example is the function f(t)=|t|γ with γ∈(0,1).
Alexander V. Sobolev
wiley   +1 more source

Lipschitz estimates for the Berezin transform

open access: yesJournal of Function Spaces, Volume 8, Issue 2, Page 103-128, 2010., 2010
We consider the generalized Fock space A2(μm), where μm is the measure with weight e−|z|m, m > 0, with respect to the Lebesgue measure on Cn. Improving upon a recent result of L. Coburn and J. Xia, we show that for any bounded operator X on A2(μm) , the Berezin transform of X satisfies Lipschitz estimates.
Hélène Bommier-Hato, Miroslav Engliš
wiley   +1 more source

Volterra composition operators from generalized weighted weighted Bergman spaces to µ‐Bloch spaces

open access: yesJournal of Function Spaces, Volume 7, Issue 3, Page 225-240, 2009., 2009
Let φ be a holomorphic self‐map and g be a fixed holomorphic function on the unit ball B. The boundedness and compactness of the operator Tg,φf(z)=∫01f(φ(tz))ℜg(tz)dtt from the generalized weighted Bergman space into the µ‐Bloch space are studied in this paper.
Xiangling Zhu
wiley   +1 more source

A new class of linear operators on ℓ2 and Schur multipliers for them

open access: yesJournal of Function Spaces, Volume 5, Issue 2, Page 151-165, 2007., 2007
We introduce the space Bw(ℓ2) of linear (unbounded) operators on ℓ2 which map decreasing sequences from ℓ2 into sequences from ℓ2 and we find some classes of operators belonging either to Bw(ℓ2) or to the space of all Schur multipliers on Bw(ℓ2). For instance we show that the space B(ℓ2) of all bounded operators on ℓ2 is contained in the space of all ...
Anca-Nicoleta Marcoci   +2 more
wiley   +1 more source

Toeplitz operators and Wiener-Hopf factorisation: an introduction

open access: yesConcrete Operators, 2017
Wiener-Hopf factorisation plays an important role in the theory of Toeplitz operators. We consider here Toeplitz operators in the Hardy spaces Hp of the upper half-plane and we review how their Fredholm properties can be studied in terms of a Wiener-Hopf
Câmara M. Cristina
doaj   +1 more source

Matriceal Lebesgue spaces and Hölder inequality

open access: yesJournal of Function Spaces, Volume 3, Issue 3, Page 239-249, 2005., 2005
We introduce a class of spaces of infinite matrices similar to the class of Lebesgue spaces Lp(T), 1 ≤ p ≤ ∞, and we prove matriceal versions of Hölder inequality.
Sorina Barza   +3 more
wiley   +1 more source

Essential norm of weighted composition operator between α‐Bloch space and β‐Bloch space in polydiscs

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 71, Page 3941-3950, 2004., 2004
Let φ(z) = (φ1(z), …, φn(z)) be a holomorphic self‐map of 𝔻n and ψ(z) a holomorphic function on 𝔻n, where 𝔻n is the unit polydiscs of ℂn. Let 0 < α, β < 1, we compute the essential norm of a weighted composition operator ψCφ between α‐Bloch space ℬα(𝔻n) and β‐Bloch space ℬβ(𝔻n).
Li Songxiao, Zhu Xiangling
wiley   +1 more source

Block Toeplitz operators with frequency‐modulated semi‐almost periodic symbols

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2003, Issue 34, Page 2157-2176, 2003., 2003
This paper is concerned with the influence of frequency modulation on the semi‐Fredholm properties of Toeplitz operators with oscillating matrix symbols. The main results give conditions on an orientation‐preserving homeomorphism α of the real line that ensure the following: if b belongs to a certain class of oscillating matrix functions (periodic ...
A. Böttcher, S. Grudsky, I. Spitkovsky
wiley   +1 more source

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