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Asymptotic Expansions: Cambridge Tracts in Mathematics, cartea 55

Autor E. T. Copson
en Limba Engleză Paperback – 2 iun 2004
Certain functions, capable of expansion only as a divergent series, may nevertheless be calculated with great accuracy by taking the sum of a suitable number of terms. The theory of such asymptotic expansions is of great importance in many branches of pure and applied mathematics and in theoretical physics. Solutions of ordinary differential equations are frequently obtained in the form of a definite integral or contour integral, and this tract is concerned with the asymptotic representation of a function of a real or complex variable defined in this way. After a preliminary account of the properties of asymptotic series, the standard methods of deriving the asymptotic expansion of an integral are explained in detail and illustrated by the expansions of various special functions. These methods include integration by parts, Laplace's approximation, Watson's lemma on Laplace transforms, the method of steepest descents, and the saddle-point method. The last two chapters deal with Airy's integral and uniform asymptotic expansions.
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Specificații

ISBN-13: 9780521604826
ISBN-10: 0521604826
Pagini: 132
Dimensiuni: 142 x 215 x 9 mm
Greutate: 0.18 kg
Editura: Cambridge University Press
Colecția Cambridge University Press
Seria Cambridge Tracts in Mathematics

Locul publicării:Cambridge, United Kingdom

Cuprins

Preface; 1. Introduction; 2. Preliminaries; 3. Integration by parts; 4. The method of stationary phase; 5. The method of Laplace; 6. Watson's lemma; 7. The method of steepest descents; 8. The saddle-point method; 9. Airy's integral; 10. Uniform asymptotic expansions; Bibliography; Index.

Descriere

Asymptotic representation of a function os of great importance in many branches of pure and applied mathematics.