Office of Academic Resources
Chulalongkorn University
Chulalongkorn University

Home / Help

AuthorSaff, Edward B. author
TitleLogarithmic Potentials with External Fields [electronic resource] / by Edward B. Saff, Vilmos Totik
ImprintBerlin, Heidelberg : Springer Berlin Heidelberg : Imprint: Springer, 1997
Connect to
Descript XV, 505 p. online resource


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 extenยญ 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 reยญ 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

Mathematics Mathematical analysis Analysis (Mathematics) Functions of complex variables Potential theory (Mathematics) Applied mathematics Engineering mathematics Physics Mathematics Analysis Appl.Mathematics/Computational Methods of Engineering Applications of Mathematics Potential Theory Theoretical Mathematical and Computational Physics Functions of a Complex Variable


Office of Academic Resources, Chulalongkorn University, Phayathai Rd. Pathumwan Bangkok 10330 Thailand

Contact Us

Tel. 0-2218-2929,
0-2218-2927 (Library Service)
0-2218-2903 (Administrative Division)
Fax. 0-2215-3617, 0-2218-2907

Social Network


facebook   instragram