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 concisely written book gives an elementary introduction to a classical area of mathematics – approximation theory – in a way that naturally leads to th

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

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