D. Thompson

activity

20202026

most citedThe norm of a skew polynomial

1 citations · 2 across the 6 of their papers we have counts for

collaborators

Showing 2022Show all

3 papers · 1 filter

math.FA2022

Closed-range posinormal operators and their products

Paul Bourdon, Carlos Kubrusly, Trieu Le +1

We focus on two problems relating to the question of when the product of two posinormal operators is posinormal, giving (1) necessary conditions and sufficient conditions for posin…

math.FA2022★ 1 cited

Powers of posinormal Hilbert-space operators

Paul S. Bourdon, C. S. Kubrusly, Derek Thompson

A bounded linear operator $A$ on a Hilbert space $H$ is posinormal if there exists a positive operator $P$ such that $A A^{*} = A^{*} P A$ . We show that if $A$ is posinormal…

math.FA2022

Posinormal Composition Operators on $H^{2}$

Paul S. Bourdon, Derek Thompson

A bounded linear operator $A$ on a Hilbert space is posinormal if there exists a positive operator $P$ such that $A A^{*} = A^{*} P A$ . Posinormality of $A$ is equivalent to the inclu…

Closed-range posinormal operators and their products

Powers of posinormal Hilbert-space operators

Posinormal Composition Operators on H2

Posinormal Composition Operators on $H^{2}$