Algebraic Approximation

A Guide to Past and Current Solutions

By: Jorge Bustamante

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Paperback | 16 November 2011

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216 Pages

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23.5 x 16.51 x 1.91

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Preface.- 1 Some Notes on Trigonometric Approximation.- Early years.- Direct and converse results: a motivation.- Some asymptotic results.- 2 The End Points Effect.- Two different problems.- Nikolskii's discovery.- Problems connected with Nikolskii's result.- Timan-type estimates.- Estimates with higher-order moduli.- Gopengauz-Teliakovskii-type estimates.- Characterization of some classes of functions.- Simultaneous approximation.- Zamansky-type estimates.- Fuksman-Potapov solution to the second problem.- Integral metrics.- Lp, 0 < p < 1.- TheWhitney theorem.- Other classes of functions.- 3 Looking for New Moduli.- The works of Potapov.- Butzer and the method of Fourier transforms.- The Ï modulus of Ivanov.- Ditzian-Totik moduli.- Felten modulus.- 4 Exact Estimates and Asymptotics.- Asymptotics for Lip1(M,[â'1,1].- Estimates for Wr.- Asymptotics for Cr,w[â'1,1].- Estimates for integrable functions.- Pointwise asymptotics.- 5 Construction of Special Operators.- Estimates in norm.- Timan-type estimates.- Gopengauz estimates.- Bernstein interpolation process.- Integral operators.- Simultaneous approximation.- Estimation with constants.- The boolean sums approach.- Discrete operators.- Bibliography.- Index.

Industry Reviews

From the reviews:

"This book is a survey of several topics in algebraic polynomial approximation on a finite interval, mostly related to the degree of approximation. ... The book can be of great help to researchers, both those taking their first steps in the subject and veteran researchers who need to check references." (D. Leviatan, Mathematical Reviews, September, 2013)

"The monograph presents an exposition of results related to direct and converse theorems in the theory of approximation by algebraic polynomials in a finite interval. ... The main achievement of the book is that it gathers some different known solutions to problems in algebraic approximation that are not collected in other text books. ... this book is a very helpful tool for students and researchers interested in approximation by algebraic polynomials." (Daniel Cardenas-Morales, Zentralblatt MATH, Vol. 1248, 2012)

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