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This textbook offers an accessible introduction to the theory and numerics of approximation methods, combining classical topics of approximation with recent advances in mathematical signal processing, and adopting a constructive approach, in which the development of numerical algorithms for data analysis plays an important role.
The following topics are covered:
_ least-squares approximation and regularization methods
_ interpolation by algebraic and trigonometric polynomials
_ basic results on best approximations
_ Euclidean approximation
_ Chebyshev approximation
_ asymptotic concepts: error estimates and convergence rates
_ signal approximation by Fourier and wavelet methods
_ kernel-based multivariate approximation
_ approximation methods in computerized tomography
Providing numerous supporting examples, graphical illustrations, and carefully selected exercises, this textbook is suitable for introductory courses, seminars, and distance learning programs on approximation for undergraduate students.
The following topics are covered:
_ least-squares approximation and regularization methods
_ interpolation by algebraic and trigonometric polynomials
_ basic results on best approximations
_ Euclidean approximation
_ Chebyshev approximation
_ asymptotic concepts: error estimates and convergence rates
_ signal approximation by Fourier and wavelet methods
_ kernel-based multivariate approximation
_ approximation methods in computerized tomography
Providing numerous supporting examples, graphical illustrations, and carefully selected exercises, this textbook is suitable for introductory courses, seminars, and distance learning programs on approximation for undergraduate students.
"This book is an excellent first course in approximation theory, covering all the aspects from theoretical results to practical methods, from discrete to continuous approximation, from univariate to multivariate. ... The book is an excellent text for an undergraduate course in approximation methods. ... this book is a very important textbook on approximation theory and its methods." (Ana Cristina Matos, Mathematical Reviews, August, 2019)