3 citations · 3 across the 4 of their papers we have counts for
4 papers
The operator Fejer-Riesz theorem
Michael A. Dritschel, James Rovnyak
The Fejer-Riesz theorem has inspired numerous generalizations in one and several variables, and for matrix- and operator-valued functions. This paper is a survey of some old and re…
Schwarz-Pick inequalities for the Schur-Agler class on the polydisk and unit ball
J. Milne Anderson, Michael A. Dritschel, James Rovnyak
The notion of a unitary realization is used to estimate derivatives of arbitrary order of functions in the Schur-Agler class on the polydisk and unit ball.
Notes on interpolation in the generalized Schur class. II. Nudel'man's problem
D. Alpay, T. Constantinescu, A. Dijksma +1
An indefinite generalization of Nudel'man's problem is used in a systematic approach to interpolation theorems for generalized Schur and Nevanlinna functions with interior and boun…
A note on interpolation in the generalized Schur class
D. Alpay, T. Constantinescu, A. Dijksma +1
Realization theory for operator colligations on Pontryagin spaces is used to study interpolation and factorization in generalized Schur classes. Several criteria are derived which…