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math.FA2012★ 1 cited
On applications of the model spaces to the construction of cocyclic perturbations of the semigroup of shifts on the semiaxis
G. G. Amosov, A. D. Baranov, V. V. Kapustin
We describe a construction of cocyclic perturbations of the semigroup of shifts on the semiaxis by means of the theory of model spaces. It is shown that one can choose an inner fun…
math.CV2012
De Branges' theorem on approximation problems of Bernstein type
Anton Baranov, Harald Woracek
The Bernstein approximation problem is to determine whether or not the space of all polynomials is dense in a given weighted -space on the real line. A theorem of L. de Brange…