Nonstandard asymptotic analysis
著者
書誌事項
Nonstandard asymptotic analysis
（Lecture notes in mathematics, 1249）
Springer-Verlag, c1987
- : gw
- : us
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注記
Bibliography: p. 177-180
Includes index
"Subseries: Institut de Mathématiques, Université de Strasbourg" -- Cover
内容説明・目次
内容説明
This research monograph considers the subject of asymptotics from a nonstandard view point. It is intended both for classical asymptoticists - they will discover a new approach to problems very familiar to them - and for nonstandard analysts but includes topics of general interest, like the remarkable behaviour of Taylor polynomials of elementary functions. Noting that within nonstandard analysis, "small", "large", and "domain of validity of asymptotic behaviour" have a precise meaning, a nonstandard alternative to classical asymptotics is developed. Special emphasis is given to applications in numerical approximation by convergent and divergent expansions: in the latter case a clear asymptotic answer is given to the problem of optimal approximation, which is valid for a large class of functions including many special functions. The author's approach is didactical. The book opens with a large introductory chapter which can be read without much knowledge of nonstandard analysis. Here the main features of the theory are presented via concrete examples, with many numerical and graphic illustrations. N
目次
Four examples of nonstandard reasoning in asymptotics.- Asymptotic expressions for the remainders associated to expansions of type , where cn+p/cn ? c.- Asymptotic expressions for the remainders associated to expansions of type : Critical regions, uniform behaviour.- External sets.- Approximation lemma's.- Shadow expansions.
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