6 citations · 17 across the 24 of their papers we have counts for
5 papers · 1 filter
Restriction of Uniform Crossnorms
Carlos S. Kubrusly
Consider the space of operators on the tensors product of normed spaces and equipped with a uniform crossnorm Take the i…
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…
Trace-Class and Nuclear Operators
Carlos S. Kubrusly
This paper explores the long journey from projective tensor products of a pair of Banach spaces, passing through the definition of nuclear operators still on the realm of projectiv…
Powers of posinormal Hilbert-space operators
Paul S. Bourdon, C. S. Kubrusly, Derek Thompson
A bounded linear operator on a Hilbert space is posinormal if there exists a positive operator such that . We show that if is posinormal…
Powers of posinormal operators
C. S. Kubrusly, P. C. M. Vieira, J. Zanni
Square of a posinormal operator is not necessarily posinormal But (i) powers of quasiposinormal operators are quasiposinormal and, under closed ranges assumption, powers of (ii)…