| Author | : Theodore J. Rivlin |
| Publisher | : Courier Corporation |
| Total Pages | : 164 |
| Release | : 1981-01-01 |
| Genre | : Mathematics |
| ISBN | : 9780486640693 |
Mathematics of Computing -- Numerical Analysis.
Approximation of Functions
| Author | : G. G. Lorentz |
| Publisher | : American Mathematical Society |
| Total Pages | : 200 |
| Release | : 2023-05-08 |
| Genre | : Mathematics |
| ISBN | : 1470474948 |
This is an easily accessible account of the approximation of functions. It is simple and without unnecessary details, but complete enough to include the classical results of the theory. With only a few exceptions, only functions of one real variable are considered. A major theme is the degree of uniform approximation by linear sets of functions. This encompasses approximations by trigonometric polynomials, algebraic polynomials, rational functions, and polynomial operators. The chapter on approximation by operators does not assume extensive knowledge of functional analysis. Two chapters cover the important topics of widths and entropy. The last chapter covers the solution by Kolmogorov and Arnol?d of Hilbert's 13th problem. There are notes at the end of each chapter that give information about important topics not treated in the main text. Each chapter also has a short set of challenging problems, which serve as illustrations.
Interpolation and Approximation
| Author | : Philip J. Davis |
| Publisher | : Courier Corporation |
| Total Pages | : 418 |
| Release | : 1975-01-01 |
| Genre | : Mathematics |
| ISBN | : 0486624951 |
Intermediate-level survey covers remainder theory, convergence theorems, and uniform and best approximation. Other topics include least square approximation, Hilbert space, orthogonal polynomials, theory of closure and completeness, and more. 1963 edition.
Theory of Uniform Approximation of Functions by Polynomials
| Author | : Vladislav K. Dzyadyk |
| Publisher | : Walter de Gruyter |
| Total Pages | : 497 |
| Release | : 2008-09-25 |
| Genre | : Mathematics |
| ISBN | : 3110208245 |
A thorough, self-contained and easily accessible treatment of the theory on the polynomial best approximation of functions with respect to maximum norms. The topics include Chebychev theory, Weierstraß theorems, smoothness of functions, and continuation of functions.
Approximation Theory and Methods
| Author | : M. J. D. Powell |
| Publisher | : Cambridge University Press |
| Total Pages | : 356 |
| Release | : 1981-03-31 |
| Genre | : Mathematics |
| ISBN | : 9780521295147 |
Most functions that occur in mathematics cannot be used directly in computer calculations. Instead they are approximated by manageable functions such as polynomials and piecewise polynomials. The general theory of the subject and its application to polynomial approximation are classical, but piecewise polynomials have become far more useful during the last twenty years. Thus many important theoretical properties have been found recently and many new techniques for the automatic calculation of approximations to prescribed accuracy have been developed. This book gives a thorough and coherent introduction to the theory that is the basis of current approximation methods. Professor Powell describes and analyses the main techniques of calculation supplying sufficient motivation throughout the book to make it accessible to scientists and engineers who require approximation methods for practical needs. Because the book is based on a course of lectures to third-year undergraduates in mathematics at Cambridge University, sufficient attention is given to theory to make it highly suitable as a mathematical textbook at undergraduate or postgraduate level.
An Introduction to Orthogonal Polynomials
| Author | : Theodore S Chihara |
| Publisher | : Courier Corporation |
| Total Pages | : 276 |
| Release | : 2011-02-17 |
| Genre | : Mathematics |
| ISBN | : 0486479293 |
"This concise introduction covers general elementary theory related to orthogonal polynomials and assumes only a first undergraduate course in real analysis. Topics include the representation theorem and distribution functions, continued fractions and chain sequences, the recurrence formula and properties of orthogonal polynomials, special functions, and some specific systems of orthogonal polynomials. 1978 edition"--
Approximation Theory and Approximation Practice, Extended Edition
| Author | : Lloyd N. Trefethen |
| Publisher | : SIAM |
| Total Pages | : 377 |
| Release | : 2019-01-01 |
| Genre | : Mathematics |
| ISBN | : 1611975948 |
This is a textbook on classical polynomial and rational approximation theory for the twenty-first century. Aimed at advanced undergraduates and graduate students across all of applied mathematics, it uses MATLAB to teach the fields most important ideas and results. Approximation Theory and Approximation Practice, Extended Edition differs fundamentally from other works on approximation theory in a number of ways: its emphasis is on topics close to numerical algorithms; concepts are illustrated with Chebfun; and each chapter is a PUBLISHable MATLAB M-file, available online. The book centers on theorems and methods for analytic functions, which appear so often in applications, rather than on functions at the edge of discontinuity with their seductive theoretical challenges. Original sources are cited rather than textbooks, and each item in the bibliography is accompanied by an editorial comment. In addition, each chapter has a collection of exercises, which span a wide range from mathematical theory to Chebfun-based numerical experimentation. This textbook is appropriate for advanced undergraduate or graduate students who have an understanding of numerical analysis and complex analysis. It is also appropriate for seasoned mathematicians who use MATLAB.
A Course in Approximation Theory
| Author | : Elliott Ward Cheney |
| Publisher | : American Mathematical Soc. |
| Total Pages | : 379 |
| Release | : 2009-01-13 |
| Genre | : Mathematics |
| ISBN | : 0821847988 |
This textbook is designed for graduate students in mathematics, physics, engineering, and computer science. Its purpose is to guide the reader in exploring contemporary approximation theory. The emphasis is on multi-variable approximation theory, i.e., the approximation of functions in several variables, as opposed to the classical theory of functions in one variable. Most of the topics in the book, heretofore accessible only through research papers, are treated here from the basics to the currently active research, often motivated by practical problems arising in diverse applications such as science, engineering, geophysics, and business and economics. Among these topics are projections, interpolation paradigms, positive definite functions, interpolation theorems of Schoenberg and Micchelli, tomography, artificial neural networks, wavelets, thin-plate splines, box splines, ridge functions, and convolutions. An important and valuable feature of the book is the bibliography of almost 600 items directing the reader to important books and research papers. There are 438 problems and exercises scattered through the book allowing the student reader to get a better understanding of the subject.
Spherical Harmonics and Approximations on the Unit Sphere: An Introduction
| Author | : Kendall Atkinson |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 253 |
| Release | : 2012-02-17 |
| Genre | : Mathematics |
| ISBN | : 3642259820 |
These notes provide an introduction to the theory of spherical harmonics in an arbitrary dimension as well as an overview of classical and recent results on some aspects of the approximation of functions by spherical polynomials and numerical integration over the unit sphere. The notes are intended for graduate students in the mathematical sciences and researchers who are interested in solving problems involving partial differential and integral equations on the unit sphere, especially on the unit sphere in three-dimensional Euclidean space. Some related work for approximation on the unit disk in the plane is also briefly discussed, with results being generalizable to the unit ball in more dimensions.
