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BOUNDARY ANGULAR DERIVATIVES OF GENERALIZED SCHUR FUNCTIONS

Part of: General theory of linear operators

Published online by Cambridge University Press:  08 March 2013

VLADIMIR BOLOTNIKOV ,
TENGYAO WANG  and
JOSHUA M. WEISS
VLADIMIR BOLOTNIKOV*
Affiliation:
Department of Mathematics, The College of William and Mary, Williamsburg, VA, USA
TENGYAO WANG
Affiliation:
Department of Mathematics, Princeton University, Princeton, NJ, USA email [email protected]
JOSHUA M. WEISS
Affiliation:
Department of Mathematics, Haverford College, Haverford, PA, USA email [email protected]
*
✉[email protected]
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Abstract

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Characterization of generalized Schur functions in terms of their Taylor coefficients was established by Krein and Langer [‘Über einige Fortsetzungsprobleme, die eng mit der Theorie hermitescher Operatoren im Raume ${\Pi }_{\kappa } $ zusammenhängen. I. Einige Funktionenklassen und ihre Darstellungen’, Math. Nachr. 77 (1977), 187–236]. We establish a boundary analogue of this characterization.

Keywords

boundary interpolationangular derivativesgeneralized Schur functions

MSC classification

Secondary: 47A57: Operator methods in interpolation, moment and extension problems 47A20: Dilations, extensions, compressions 47A48: Operator colligations (= nodes), vessels, linear systems, characteristic functions, realizations, etc.
Type
Research Article
Information
Journal of the Australian Mathematical Society , Volume 93 , Issue 3 , December 2012 , pp. 203 - 224
Copyright
Copyright ©2013 Australian Mathematical Publishing Association Inc. 

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