Title
Partial Differential Equations And Boundaryvalue Problems With Applications (Pure And Applied Undergraduate Texts),Used
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Building on the basic techniques of separation of variables and Fourier series, the book presents the solution of boundaryvalue problems for basic partial differential the heat equation, wave equation, and Laplace equation, considered in various standard coordinate systemsrectangular, cylindrical, and spherical. Each of the equations is derived in the threedimensional context; the solutions are organized according to the geometry of the coordinate system, which makes the mathematics especially transparent. Bessel and Legendre functions are studied and used whenever appropriate throughout the text. The notions of steadystate solution of closely related stationary solutions are developed for the heat equation; applications to the study of heat flow in the earth are presented. The problem of the vibrating string is studied in detail both in the Fourier transform setting and from the viewpoint of the explicit representation (d'Alembert formula). Additional chapters include the numerical analysis of solutions and the method of Green's functions for solutions of partial differential equations. The exposition also includes asymptotic methods (Laplace transform and stationary phase). With more than 200 working examples and 700 exercises (more than 450 with answers), the book is suitable for an undergraduate course in partial differential equations.
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