Relative asymptotics for orthogonal matrix polynomials with respect to a perturbed matrix measure on the unit circle |
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Authors: | Hossain O Yakhlef Francisco Marcellán |
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Institution: | 1. Universidad de Granada, Spain;2. Universidad Carlos Ⅲ De Madrid, Spain |
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Abstract: | Given a positive definite matrix measure Ω supported on the unit circle T, then main purpose of this paper is to study the asymptotic behavior of Ln(Ω)Ln(Ω)-1 and Φn(z;Ω)Φn(z;Ω)-1 where Ω(z) = Ω(z) + zδ(z - w); |w| > 1,M is a positive definite matrix and δ is the Dirac matrix measure. Here, Ln ( @ ) means the leading coefficient of the orthonormal matrix polynomials Φn(z; @ ).Finally, we deduce the asymptotic behavior of Φn (w;Ω)Φn (w;Ω) * in the case when M=I. |
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