Topics in Interpolation Theory of Rational Matrix-valued Functions - Couverture rigide

Couverture rigide

ISBN 10 : 3764322330 ISBN 13 : 9783764322335

Editeur : Birkhauser Verlag AG, 1988

Synopsis

One of the basic interpolation problems from our point of view is the problem of building a scalar rational function if its poles and zeros with their multiplicities are given. If one assurnes that the function does not have a pole or a zero at infinity, the formula which solves this problem is (1) where Zl , " " Z/ are the given zeros with given multiplicates nl, " " n / and Wb" " W are the given p poles with given multiplicities ml, ...,m , and a is an arbitrary nonzero number. p An obvious necessary and sufficient condition for solvability of this simplest Interpolation pr- lern is that Zj :f: wk(1~ j ~ 1, 1~ k~ p) and nl +...+n/ = ml +...+m ' p The second problem of interpolation in which we are interested is to build a rational matrix function via its zeros which on the imaginary line has modulus 1. In the case the function is scalar, the formula which solves this problem is a Blaschke product, namely z z. )mi n u(z) = all = l~ (2) J ( Z+ Zj where [o] = 1, and the zj's are the given zeros with given multiplicities mj. Here the necessary and sufficient condition for existence of such u(z) is that zp :f: - Zq for 1~ ]1, q~ n.

Détails de l'édition

• Éditeur: Birkhauser Verlag AG
• Date d'édition: 1988
• ISBN 10: 3764322330
• ISBN 13: 9783764322335
• Reliure: Relié
• Langue: anglais
• Nombre de pages: 247
• Éditeur: Gohberg Prof. Israel
• Coordonnées du fabricant: non disponible