[PDF][PDF] Weakly n-hyponormal weighted shifts: a sufficient condition and their examples
S Baek, MR Lee, C Li - Filomat, 2023 - pmf.ni.ac.rs
The n-hyponormal and weakly n-hyponormal weighted shifts were developed to study
bridges of operators between the subnormal and hyponormal operators on an infinite …
bridges of operators between the subnormal and hyponormal operators on an infinite …
On a construction method of new moment sequences
S Baek, H Choi, S Yoo - Monatshefte für Mathematik, 2024 - Springer
In this paper we provide a way to construct new moment sequences from a given moment
sequence. An operator based on multivariate positive polynomials is applied to get new …
sequence. An operator based on multivariate positive polynomials is applied to get new …