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 10
... characteristic curve , which is its range ) . If a surface S : z = u ( x , y ) is a union of characteristic curves , then S is an integral surface . For then through any point P of S there passes a characteristic curve y contained in S ...
... characteristic curve , which is its range ) . If a surface S : z = u ( x , y ) is a union of characteristic curves , then S is an integral surface . For then through any point P of S there passes a characteristic curve y contained in S ...
Página 13
... characteristic direction ( a , b , c ) , and hence that Σ is an integral surface . [ One can also verify analytically that the function u represented by ( 5.9 ) satisfies the differential equation ( 4.2 ) by first expressing u ,,, in ...
... characteristic direction ( a , b , c ) , and hence that Σ is an integral surface . [ One can also verify analytically that the function u represented by ( 5.9 ) satisfies the differential equation ( 4.2 ) by first expressing u ,,, in ...
Página 60
... characteristic form Q ( 5 ) of the operator L defined by ( 2.14 ) , ( 2.11 ) generally depends on 5 and on the arguments of the A , that is , on x and the Du with | B | < m - 1 . A hypersurface is characteristic for the operator L ( and ...
... characteristic form Q ( 5 ) of the operator L defined by ( 2.14 ) , ( 2.11 ) generally depends on 5 and on the arguments of the A , that is , on x and the Du with | B | < m - 1 . A hypersurface is characteristic for the operator L ( and ...
Contenido
Chapter | 1 |
Examples | 2 |
Analytic Solution and Approximation Methods in a Simple Example Problems 4 Quasilinear Equations | 4 |
Derechos de autor | |
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analytic functions assume ball boundary bounded uniformly Cauchy data Cauchy problem Cauchy sequence Chapter characteristic curves class C² coefficients compact support complex constant continuous converge defined denote derivatives of orders difference quotients Dirichlet problem domain of dependence elliptic exists follows formula Fourier function f fundamental solution Gårding Gårding's inequality given harmonic function heat equation hence Hint Ho(N holds identity implies inequality initial data initial values initial-value problem integral surface Laplace equation Lemma linear matrix maximum principle neighborhood non-characteristic norm obtained open set partial differential equation plane polynomial power series prescribed proof real analytic real numbers satisfies scalar Show solution u(x,t solved space square integrable sufficiently small test functions theorem u₁ vanish variables vector wave equation x₁ ΘΩ