C. Cowen

activity

20122023

most citedConvexity of the Berezin Range

12 citations · 27 across the 4 of their papers we have counts for

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3 papers · 1 filter

math.FA2023★ 1 cited

Constructing Invariant Subspaces as Kernels of Commuting Matrices

Carl C. Cowen, William Johnston, Rebecca G. Wahl

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 h…

math.FA2021★ 12 cited

Convexity of the Berezin Range

Carl C. Cowen, Christopher Felder

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 se…

math.FA2014★ 9 cited

Spectra of Some Weighted Composition Operators on $H^{2}$

Carl Cowen, Eungil Ko, Derek Thompson +1

We completely characterize the spectrum of a weighted composition operator $W_{ψ, φ}$ on $H^{2} (D)$ when $φ$ has Denjoy-Wolff point $a$ with $0 < ∣ φ^{'} (a) ∣ < 1$ , the iterates,…

Constructing Invariant Subspaces as Kernels of Commuting Matrices

Convexity of the Berezin Range

Spectra of Some Weighted Composition Operators on H2

Spectra of Some Weighted Composition Operators on $H^{2}$