G. Exner

collaborators

2 papers

math.FA2026

Signed representing measures (Berger-type charges) in subnormality and related properties of weighted shifts

Chafiq Benhida, RaÃºl 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…

math.FA2026

Geometrically regular weighted shifts

Chafiq Benhida, Raul E. Curto, George R. Exner

We study a general class of weighted shifts whose weights $I^\pm$ are given by $I^\pm_{n} = \frac{p ^{n} + N}{p ^{n} + D}$ , where $p > 1$ and $N$ and $D$ are parameters so that $(N,D) \in…