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Theory of Approximation of Functions of a Real Variable discusses a number of fundamental parts of the modern theory of approximation of functions of a real var

Mathematics of Computing -- Numerical Analysis.

This is an easily accessible account of the approximation of functions. It is simple and without unnecessary details, but complete enough to include the classic

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

Complex analysis is one of the most central subjects in mathematics. It is compelling and rich in its own right, but it is also remarkably useful in a wide vari