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math.FA2024
Classes of operators related to subnormal operators
Raúl E. Curto, Thankarajan Prasad
In this paper we attempt to lay the foundations for a theory encompassing some natural extensions of the class of subnormal operators, namely the --subnormal operators and the s…
math.FA2024
Signed representing measures (Berger-type charges) in subnormality and related properties of weighted shifts
Chafiq Benhida, Raúl E. Curto, George R. Exner
In the study of the geometrically regular weighted shifts (GRWS) -- see [5] -- signed power representing measures (which we call Berger-type charges) played an important role. Moti…