5 citations · 9 across the 7 of their papers we have counts for
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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…
Lattice structures for quantum channels
T. Constantinescu
We suggest that a certain one-to-one parametrization of completely positive maps on the matrix algebra might be useful in the study of quantum channels. This is illustrated in the…
Tensor algebras, displacement structure, and the Schur algorithm
T. Constantinescu, J. L. Johnson
In this paper we explore the connection between tensor algebras and displacement structure. We describe a scattering experiment in this framework, we obtain a realization of the el…
A note on noncommutative interpolation
T. Constantinescu, J. L. Johnson
In this paper we formulate and solve Nevanlinna-Pick and Carathéodory type problems for tensor algebras with data given on the N-dimensional operator unit ball of a Hilbert space.…