".well written and well organized.It contains many exercises and can be used as a textbook in an advanced course on topics in approximation theory.The book has a nice blend of theory and applications and should make a valuable reference book to researchers as well as teachers."--Mathematical Reviews"The authors.do a fine job of combining their ideas into a coherent text that is a must for researchers and advanced students of the subject." --Computing Reviews"This book covers basic results of approximation theory. It contains also new developments in the theory of moments and Sinc approximation, n-widths, s-numbers and the relationship of these to computational algorithms .

This important book can be of great interest to graduate students and researchers in approximation, constructive function theory and numerical methods." --Zentralblatt für Mathematik und ihre Grenzgebiete".well written and well organized.It contains many exercises and can be used as a textbook in an advanced course on topics in approximation theory.The book has a nice blend of theory and applications and should make a valuable reference book to researchers as well as teachers."--Mathematical Reviews"The authors.do a fine job of combining their ideas into a coherent text that is a must for researchers and advanced students of the subject." --Computing Reviews"This book covers basic results of approximation theory.

It contains also new developments in the theory of moments and Sinc approximation, n-widths, s-numbers and the relationship of these to computational algorithms . This important book can be of great interest to graduate students and researchers in approximation, constructive function theory and numerical methods." --Zentralblatt für Mathematik und ihre Grenzgebiete.