Abstract
This chapter concentrates on the necessary and sufficient conditions for the existence of solutions for classical and modern H∞ interpolation problems. These interpolation problems have their roots deep in classical analysis, and they are introduced here in a sophisticated way for operator valued functions with operator arguments. Included are the Nevanlinna-Pick, Hermite-Fejér, Nehari, Sarason and Nudelman interpolation problems, in their classical and tangential form. Both one sided and two-sided versions are considered. Proofs of the main existence results will be given in the next chapter, based on the commutant lifting theorem.
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© 1998 Springer Basel AG
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Foias, C., Frazho, A.E., Gohberg, I., Kaashoek, M.A. (1998). Interpolation Problems for Operator-Valued Functions. In: Metric Constrained Interpolation, Commutant Lifting and Systems. Operator Theory Advances and Applications, vol 100. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8791-5_2
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DOI: https://doi.org/10.1007/978-3-0348-8791-5_2
Publisher Name: Birkhäuser, Basel
Print ISBN: 978-3-0348-9775-4
Online ISBN: 978-3-0348-8791-5
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