Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Hyun‐Kyoung Kwon"'
Publikováno v:
Mathematische Nachrichten. 295:2197-2222
Publikováno v:
Linear Algebra and its Applications. 592:20-47
When the backward shift operator on a weighted space $H^2_w=\{f=\sum_{j=0} ^{\infty} a_jz^j : \sum_{j=0}^{\infty} |a_j|^2w_j < \infty\}$ is an $n$-hypercontraction, we prove that the weights must satisfy the inequality $$\frac{w_{j+1}}{w_j} \leq {\fr
Publikováno v:
Linear and Multilinear Algebra. 66:1215-1228
We give a characterization of binormal operator matrices, and in particular, a description of binormal Toeplitz matrices for . Non-trivial examples of binormal matrices that are not normal ...
Publikováno v:
Journal of the London Mathematical Society. 96:243-270
Let B be a locally integrable matrix function, W a matrix Ap weight with 1
Publikováno v:
Studia Mathematica. 236:193-200
Publikováno v:
Complex Analysis and Operator Theory. 12:101-109
We present a constructive method for finding a right inverse matrix of a matrix of polynomials that satisfies the corona condition. The right inverse matrix is also a matrix of polynomials and our method gives an upper bound for the degree of its ent
Publikováno v:
Proceedings of the American Mathematical Society. 144:1145-1152
The Bezout version of Hilbert’s Nullstellensatz states that polynomials without a common zero form the unit ideal. In this paper, we start with a finite number of univariate polynomials and consider the polynomials that show up as a result of the N
Publikováno v:
Journal of the London Mathematical Society. 88:637-648
Autor:
Sergei Treil, Hyun-Kyoung Kwon
Publikováno v:
Integral Equations and Operator Theory. 66:529-538
We give an example of an operator that satisfies the curvature condition as defined in Kwon and Treil (Publ Mat 53(2):417–438, 2009), but is not similar to the backward shift S* on the Hardy class H 2. We conclude therefore that the contraction ass
In [11] the authors investigated a family of quotient Hilbert modules in the Cowen-Douglas class over the unit disk constructed from classical Hilbert modules such as the Hardy and Bergman modules. In this paper we extend the results to the multivari
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