Zobrazeno 1 - 10
of 73
pro vyhledávání: '"COWEN, CARL C."'
Publikováno v:
Linear Algebra and Its Applications, 583, 46-62
Given an n by n matrix A over the complex numbers and an invariant subspace L, this paper gives a straightforward formula to construct an n by n matrix N that commutes with A and has L equal to the kernel of N. For Q a matrix putting A into Jordan ca
Externí odkaz:
http://arxiv.org/abs/2305.15375
Autor:
Cowen, Carl C., Felder, Christopher
Publikováno v:
Linear Algebra and its Applications Volume 647, 15 August 2022, Pages 47-63
This paper discusses the convexity of the range of the Berezin transform. For a bounded operator $T$ acting on a reproducing kernel Hilbert space $H$ (on a set $X$), this is the set $B(T) : = \{ < Tk_x, k_x >_H : x \in X \}$, where $k_x$ is the norma
Externí odkaz:
http://arxiv.org/abs/2109.12095
Autor:
Cowen, Carl C., Felder, Christopher
Publikováno v:
In Linear Algebra and Its Applications 15 August 2022 647:47-63
Publikováno v:
In Linear Algebra and Its Applications 15 December 2019 583:46-62
Autor:
Cowen, Carl C.
These notes answer the question "When can a finite Blaschke product $B$ be written as a composition of two finite Blaschke products $B_1$ and $B_2$, that is, $B=B_1\circ B_2$, in a non-trivial way, that is, where the order of each is greater than 1."
Externí odkaz:
http://arxiv.org/abs/1207.4010
Publikováno v:
In Journal of Functional Analysis 1 September 2016 271(5):1130-1149
Publikováno v:
In Journal of Mathematical Analysis and Applications 1 December 2015 432(1):484-503
Publikováno v:
Concrete Operators, Vol 3, Iss 1, Pp 43-51 (2016)
The Invariant Subspace Problem for Hilbert spaces is a long-standing question and the use of universal operators in the sense of Rota has been an important tool for studying such important problem. In this survey, we focus on Rota’s universal opera
Externí odkaz:
https://doaj.org/article/4fc8410efa704a43a6c36646180ecef9
Autor:
COWEN, CARL C., WAHL, REBECCA G.
Publikováno v:
Proceedings of the American Mathematical Society, 2014 Dec 01. 142(12), 4143-4154.
Externí odkaz:
http://www.jstor.org/stable/24507217
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