Partial Differential EquationsSpringer, 1982 - 249 páginas This book is a very well-accepted introduction to the subject. In it, the author identifies the significant aspects of the theory and explores them with a limited amount of machinery from mathematical analysis. Now, in this fourth edition, the book has again been updated with an additional chapter on Lewy 's example of a linear equation without solutions. |
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Página 5
... represented by the single point § . The influence of the initial values at a particular point & on the solution u ( x , t ) ... represents a wave propagating to the right with velocity c without changing shape . ( Fig . 1.2 ) We use this ...
... represented by the single point § . The influence of the initial values at a particular point & on the solution u ( x , t ) ... represents a wave propagating to the right with velocity c without changing shape . ( Fig . 1.2 ) We use this ...
Página 13
... represents a surface Σ : z = u ( x , y ) . That Σ is an integral surface is clear in the parametric representation ... represented by ( 5.9 ) satisfies the differential equation ( 4.2 ) by first expressing u ,,, in terms of S , S ,, Tx ...
... represents a surface Σ : z = u ( x , y ) . That Σ is an integral surface is clear in the parametric representation ... represented by ( 5.9 ) satisfies the differential equation ( 4.2 ) by first expressing u ,,, in terms of S , S ,, Tx ...
Página 41
... represents initial - value problem ( 4.1 ) , ( 4.8 ) . a solution uЄC2 of the We see from ( 4.13 ) that u ( x , t ) is determined uniquely by the values of the initial functions f , g in the interval [ x- ct , x + ct ] of the x - axis ...
... represents initial - value problem ( 4.1 ) , ( 4.8 ) . a solution uЄC2 of the We see from ( 4.13 ) that u ( x , t ) is determined uniquely by the values of the initial functions f , g in the interval [ x- ct , x + ct ] of the x - axis ...
Contenido
Chapter | 1 |
Quasilinear Equations | 9 |
The Cauchy Problem | 24 |
Derechos de autor | |
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Términos y frases comunes
assume ball boundary bounded uniformly Cauchy data Cauchy problem Cauchy sequence Cauchy-Kowalevski Chapter characteristic curves class C² coefficients compact support complex constant continuous converge defined denote derivatives of orders determined uniquely difference quotients Dirichlet problem domain of dependence elliptic exists follows formula Fourier function f(x fundamental solution Gårding given Green's identity heat equation hence Hint holds identity implies inequality initial data initial values initial-value problem integral surface Laplace equation Lemma linear matrix neighborhood non-characteristic norm obtained open set partial differential equation plane polynomial power series prescribed proof quasi-linear real numbers satisfies scalar second derivatives Show solved space square integrable sufficiently small test functions theorem u₁ vanish variables vector wave equation x₁ ΘΩ