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math.FA2020★ 1 cited
Conditionally positive definiteness in operator theory
Zenon Jan Jabłoński, Il Bong Jung, Jan Stochel
In this paper we extensively investigate the class of conditionally positive definite operators, namely operators generating conditionally positive definite sequences. This class i…
math.FA2020
The Cauchy dual subnormality problem for cyclic -isometries
Akash Anand, Sameer Chavan, Zenon Jan Jabłoński +1
The Cauchy dual subnormality problem asks whether the Cauchy dual operator of a -isometry is subnormal. Recently this problem has been solved in the negative. Here we show that…