26 citations · 55 across the 41 of their papers we have counts for
34 papers · 1 filter
Littlewood subordination for de Branges--Rovnyak spaces
Emmanuel Fricain, Andreas Hartmann, William T. Ross +1
In this paper, we study composition operators that act between different de Branges-Rovnyak spaces. Our main results are suggested by a paper of Mashreghi and Shabankhah concerning…
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…
The invariant subspaces of
Dan Timotin
Using the tools of Sz.-Nagy--Foias theory of contractions, we describe in detail the invariant subspaces of the operator , where is the unilateral shift on a H…
Commutant lifting and Nevanlinna-Pick interpolation in several variables
Deepak K. D., Deepak Pradhan, Jaydeb Sarkar +1
This paper concerns a commutant lifting theorem and a Nevanlinna-Pick type interpolation result in the setting of multipliers from vector-valued Drury-Arveson space to a large clas…
Algebras of block Toeplitz matrices with commuting entries
Muhammad Ahsan Khan, Dan Timotin
The maximal algebras of scalar Toeplitz matrices are known to be formed by generalized circulants. The identification of algebras consisting of block Toeplitz matrices is a harder…
Operators invariant relative to a completely nonunitary contraction
H. Bercovici, D. Timotin
Given a contraction A on a Hilbert space H, an operator T on H is said to be A-invariant if <Tx,x>=<TAx,Ax> for every x in H such that ||Ax||=||x||. In the special case in which bo…