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The field of approximation theory has become so vast that it intersects with every other branch of analysis and plays an increasingly important role in applicat

This is a textbook on classical polynomial and rational approximation theory for the twenty-first century. Aimed at advanced undergraduates and graduate student

The study of linear positive operators is an area of mathematical studies with significant relevance to studies of computer-aided geometric design, numerical an

A pioneer of many modern developments in approximation theory, N. I. Achieser designed this graduate-level text from the standpoint of functional analysis. The

In this book, we have attempted to explain a variety of different techniques and ideas which have contributed to this subject in its course of successive refine