24 citations · 51 across the 17 of their papers we have counts for
3 papers · 1 filter
Unbounded quasinormal operators revisited
Zenon Jan Jablonski, Il Bong Jung, Jan Stochel
Various characterizations of unbounded closed densely defined operators commuting with the spectral measures of their moduli are established.In particular, Kaufman's definition of…
Subnormal weighted shifts on directed trees and composition operators in spaces with non-densely defined powers
Piotr Budzynski, Piotr Dymek, Zenon Jan Jablonski +1
It is shown that for every positive integer there exists a subnormal weighted shift on a directed tree (with or without root) whose th power is densely defined while its $(n…
Unbounded Subnormal Composition Operators in L2-Spaces
Piotr Budzynski, Zenon Jan Jablonski, Il Bong Jung +1
A criterion for subnormality of unbounded composition operators in L2-spaces, written in terms of measurable families of probability measures satisfying the so-called consistency c…