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Nonstationary Interpolation Theorems

  • C. Foias
  • A. E. Frazho
  • I. Gohberg
  • M. A. Kaashoek
Part of the Operator Theory Advances and Applications book series (OT, volume 100)

Abstract

The interpolation problems introduced in this chapter are nonstationary versions of the ones appearing in Chapter I. In the present chapter the interpolants are not H-functions but lower triangular doubly infinite matrices (with operator entries) and the interpolation data depend on an additional quantity which may be viewed as a discrete time parameter. In the next chapter time-varying systems will be used to give a motivation and a further interpretation of the role of this additional time parameter.

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Copyright information

© Springer Basel AG 1998

Authors and Affiliations

  • C. Foias
    • 1
  • A. E. Frazho
    • 2
  • I. Gohberg
    • 3
  • M. A. Kaashoek
    • 4
  1. 1.Department of MathematicsIndiana UniversityBloomingtonUSA
  2. 2.Department of AeronauticsPurdue UniversityWest LafayetteUSA
  3. 3.School of Mathematical Sciences Raymond and Beverly Sackler Faculty of Exact SciencesTel Aviv UniversityRamat AvivIsrael
  4. 4.Dept. of Mathematics and Computer ScienceVrije Universiteit AmsterdamAmsterdamThe Netherlands

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