15 citations · 57 across the 16 of their papers we have counts for
18 papers
On complex symmetric weighted shifts
Chafiq Benhida, Piotr Budzyński
Unbounded complex symmetric weighted shifts are studied. Complex symmetric unilateral weighted shifts whose vectors contain the image of the canonical orthonormal basis…
Toeplitz operators on some function spaces
Chafiq Benhida, George R. Exner, Ji Eun Lee +1
We reconsider studies of Toeplitz operators on function spaces (the weighted Bergman space, the generalized derivative Hardy space) and the H-Toeplitz operators on the Bergman spac…
Signed representing measures (Berger-type charges) in subnormality and related properties of weighted shifts
Chafiq Benhida, Raúl 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…
and safe quotients for GRWS
Chafiq Benhida, Raúl E. Curto, George R. Exner
Geometrically regular weighted shifts (in short, GRWS) are those with weights given by , where and is fixed in…
Geometrically regular weighted shifts
Chafiq Benhida, Raul E. Curto, George R. Exner
We study a general class of weighted shifts whose weights are given by , where and and are parameters so that $(N,D) \in (…
Reducing subspaces of contractions
Chafiq Benhida, Emmanuel Fricain, Dan Timotin
Using the Sz.-Nagy--Foias theory of contractions, we obtain general results about reducibility for a class of completely nonunitary contractions. These are applied to certain trunc…