2 papers
math.FA2019
Some examples of -isometries
T. Bermúdez, A. Martinón, H. Zaway
We obtain the admissible sets on the unit circle to be the spectrum of a strict -isometry on an -finite dimensional Hilbert space. This property gives a better picture of the…
math.FA2018
-semigroups of -isometries on Hilbert spaces
T. Bermudez, A. Bonilla, H. Zaway
Let be a -semigroup on a separable Hilbert space . We characterize that is an -isometry for every in terms that the mapping $t\in \Bbb R^+…