Surveys in Applied Mathematics - Surveys in Applied Mathematics - Joseph B. Keller - 書籍 - Springer-Verlag New York Inc. - 9781489904386 - 2014年1月4日
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Joseph B. Keller
Surveys in Applied Mathematics - Surveys in Applied Mathematics Softcover Reprint of the Original 1st Ed. 1995 edition

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Partial differential equations play a central role in many branches of science and engineering. Therefore it is important to solve problems involving them. One aspect of solving a partial differential equation problem is to show that it is well-posed, i. e. , that it has one and only one solution, and that the solution depends continuously on the data of the problem. Another aspect is to obtain detailed quantitative information about the solution. The traditional method for doing this was to find a representation of the solution as a series or integral of known special functions, and then to evaluate the series or integral by numerical or by asymptotic methods. The shortcoming of this method is that there are relatively few problems for which such representations can be found. Consequently, the traditional method has been replaced by methods for direct solution of problems either numerically or asymptotically. This article is devoted to a particular method, called the "ray method," for the asymptotic solution of problems for linear partial differential equations governing wave propagation. These equations involve a parameter, such as the wavelength. . \, which is small compared to all other lengths in the problem. The ray method is used to construct an asymptotic expansion of the solution which is valid near . . \ = 0, or equivalently for k = 21r I A near infinity.

264 pages, biography

メディア 書籍     Paperback Book   (ソフトカバーで背表紙を接着した本)
リリース済み 2014年1月4日
ISBN13 9781489904386
出版社 Springer-Verlag New York Inc.
ページ数 264
寸法 178 × 254 × 15 mm   ·   489 g
言語 英語  

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