The Boundary Function Method for Singular Perturbed ProblemsSIAM, 01/01/1995 - 234 من الصفحات This is the first book published in English devoted solely to the boundary function method, which is one of the asymptotic methods. This method provides an effective and simple way to obtain asymptotic approximations for the solutions of certain ordinary and partial differential equations containing small parameters in front of the highest derivatives. These equations, called singularly perturbed equations, are often used in modeling. In addition to numerous examples, the book includes discussions on singularly perturbed problems from chemical kinetics and heat conduction, semiconductor device modeling, and mathematical biology. The book also contains a variety of original ideas and explicit calculations previously available only in journal literature, as well as many concrete applied problems illustrating the boundary function method algorithms. Quite general asymptotic results described in the book are rigorous in the sense that, along with the asymptotic algorithms, in most cases the theorems on estimation of the remainder terms are presented. A survey of results of Russian mathematicians on the subject is provided; many of these results are not well known in the West. Based on the Russian edition of the textbook by Vasil'eva and Butuzov, this American edition, prepared by Kalachev, differs in many aspects. The text of the book has been revised substantially, some new material has been added to every chapter, and more examples, exercises, and new references on asymptotic methods and their applications have been included. |
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accuracy algorithm analogously applied approach approximation arbitrary assume asymptotic approximation asymptotic expansion asymptotic solution boundary conditions boundary functions boundary layer boundary value problem Butuzov characteristic coefficients consider constant construct continuous corresponding critical defined depending derivatives described determined differential equations discussed domain easily eigenvalues enters equality estimate example exists exponential estimate expression Figure find formula Hence holds initial condition integral interval introduce known leading linear matching matrix means mention method notation Note obtain operator periodic presented provides reaction reduced region regular relation represented respect rest point root satisfied satisfy shown similar singularly perturbed small parameter smooth solve stable structure Substituting sufficiently taking into account theorem transition unique unknown variables Vasil’eva vector vicinity virtue zero zeroth-order approximation