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Topics in Interpolation Theory of Rational Matrix-valued Functions / by I. Gohberg
(Operator Theory: Advances and Applications. ISSN:22964878 ; 33)
版 | 1st ed. 1988. |
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出版者 | (Basel : Birkhäuser Basel : Imprint: Birkhäuser) |
出版年 | 1988 |
本文言語 | 英語 |
大きさ | IX, 247 p : online resource |
著者標目 | *Gohberg, I author SpringerLink (Online service) |
件 名 | LCSH:Social sciences LCSH:Humanities FREE:Humanities and Social Sciences |
一般注記 | 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 HTTP:URL=https://doi.org/10.1007/978-3-0348-5469-6 |
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EB00229996 |
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データ種別 | 電子ブック |
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分 類 | LCC:H1-99 LCC:AZ19.2-999 DC23:300 DC23:001.3 |
書誌ID | 4000107351 |
ISBN | 9783034854696 |
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