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The Global Parametrix in the Riemann-Hilbert Steepest Descent Analysis for Orthogonal Polynomials

The Global Parametrix in the Riemann-Hilbert Steepest Descent Analysis for Orthogonal Polynomials In the application of the Deift-Zhou steepest descent method to the Riemann-Hilbert problem for orthogonal polynomials, a model Riemann-Hilbert problem that appears in the multi-cut case is solved with the use of hyperelliptic theta functions. We present here an alternative approach which uses meromorphic differentials instead of theta functions to construct the solution of the model Riemann-Hilbert problem. By using this representation, we obtain a new and elementary proof for the solvability of the model Riemann-Hilbert problem. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Computational Methods and Function Theory Springer Journals

The Global Parametrix in the Riemann-Hilbert Steepest Descent Analysis for Orthogonal Polynomials

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References (29)

Publisher
Springer Journals
Copyright
Copyright © 2011 by Heldermann  Verlag
Subject
Mathematics; Analysis; Computational Mathematics and Numerical Analysis; Functions of a Complex Variable
ISSN
1617-9447
eISSN
2195-3724
DOI
10.1007/BF03321795
Publisher site
See Article on Publisher Site

Abstract

In the application of the Deift-Zhou steepest descent method to the Riemann-Hilbert problem for orthogonal polynomials, a model Riemann-Hilbert problem that appears in the multi-cut case is solved with the use of hyperelliptic theta functions. We present here an alternative approach which uses meromorphic differentials instead of theta functions to construct the solution of the model Riemann-Hilbert problem. By using this representation, we obtain a new and elementary proof for the solvability of the model Riemann-Hilbert problem.

Journal

Computational Methods and Function TheorySpringer Journals

Published: Aug 20, 2010

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