Logarithmic Potentials with External Fields - Edward B. Saff, Vilmos Totik

Logarithmic Potentials with External Fields

Buch | Softcover
XV, 505 Seiten
2010 | 1997
Springer Berlin (Verlag)
978-3-642-08173-6 (ISBN)
53,49 inkl. MwSt
zur Neuauflage
  • Titel erscheint in neuer Auflage
  • Artikel merken
Zu diesem Artikel existiert eine Nachauflage
In recent years approximation theory and the theory of orthogonal polynomials have witnessed a dramatic increase in the number of solutions of difficult and previously untouchable problems. This is due to the interaction of approximation theoretical techniques with classical potential theory (more precisely, the theory of logarithmic potentials, which is directly related to polynomials and to problems in the plane or on the real line). Most of the applications are based on an exten sion of classical logarithmic potential theory to the case when there is a weight (external field) present. The list of recent developments is quite impressive and includes: creation of the theory of non-classical orthogonal polynomials with re spect to exponential weights; the theory of orthogonal polynomials with respect to general measures with compact support; the theory of incomplete polynomials and their widespread generalizations, and the theory of multipoint Pade approximation. The new approach has produced long sought solutions for many problems; most notably, the Freud problems on the asymptotics of orthogonal polynomials with a respect to weights of the form exp(-Ixl ); the "l/9-th" conjecture on rational approximation of exp(x); and the problem of the exact asymptotic constant in the rational approximation of Ixl. One aim of the present book is to provide a self-contained introduction to the aforementioned "weighted" potential theory as well as to its numerous applications. As a side-product we shall also fully develop the classical theory of logarithmic potentials.

Preliminaries.- Weighted Potentials.- Recovery of Measures, Green Functions and Balayage.- Weighted Polynomials.- Determination of the Extremal Measure.- Extremal Point Methods.- Weights on the Real Line.- Applications Concerning Orthogonal Polynomials.- Signed Measures.

Erscheint lt. Verlag 8.12.2010
Reihe/Serie Grundlehren der mathematischen Wissenschaften
Zusatzinfo XV, 505 p.
Verlagsort Berlin
Sprache englisch
Maße 155 x 235 mm
Gewicht 789 g
Themenwelt Mathematik / Informatik Mathematik Analysis
Schlagworte Analysis • Approximation Theory • Capacity • external fields • extremal points • extremum problems • logarithmic potentials • orthogonal polynomials • Potential • Potential Theory • rational functions • weighted polynomials
ISBN-10 3-642-08173-8 / 3642081738
ISBN-13 978-3-642-08173-6 / 9783642081736
Zustand Neuware
Haben Sie eine Frage zum Produkt?
Mehr entdecken
aus dem Bereich

von Tilo Arens; Frank Hettlich; Christian Karpfinger …

Buch (2022)
Springer Spektrum (Verlag)
79,99