3 papers
math.FA2024
Conjugations of Unitary Operators, II
Javad Mashreghi, Marek Ptak, William T. Ross
For a given unitary operator on a separable complex Hilbert space $\h$, we describe the set of all conjugations (antilinear, isometric, and involutive…
math.FA2024
Conjugations of Unitary operators, I
Javad Mashreghi, Marek Ptak, William T. Ross
If is a unitary operator on a separable complex Hilbert space , an application of the spectral theorem says there is a conjugation on (an antilin…
math.FA2016
Characterization of truncated Toeplitz operators by conjugations
Kamila Kliś-Garlicka, Bartosz Łanucha, Marek Ptak
Truncated Toeplitz operators are C--symmetric with respect to the canonical conjugation given on an appropriate model space. However, by considering only one conjugation one cannot…