Polyharmonic Boundary Value Problems

Lingua: inglese

Editore: Springer-Verlag Berlin and Heidelberg GmbH and Co. KG, DE, 2010

3642122442 / 9783642122446

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Linear elliptic equations arise in several models describing various phenomena in the applied sciences, the most famous being the second order stationary heat eq- tion or,equivalently,the membraneequation. Forthis intensivelywell-studiedlinear problem there are two main lines of results. The ?rst line consists of existence and regularity results. Usually the solution exists and "gains two orders of differen- ation" with respect to the source term. The second line contains comparison type results, namely the property that a positive source term implies that the solution is positive under suitable side constraints such as homogeneous Dirichlet bou- ary conditions. This property is often also called positivity preserving or, simply, maximum principle. These kinds of results hold for general second order elliptic problems, see the books by Gilbarg-Trudinger [198] and Protter-Weinberger [347]. For linear higher order elliptic problems the existence and regularitytype results - main, as one may say, in their full generality whereas comparison type results may fail. Here and in the sequel "higher order" means order at least four. Most interesting models, however, are nonlinear.By now, the theory of second order elliptic problems is quite well developed for semilinear, quasilinear and even for some fully nonlinear problems. If one looks closely at the tools being used in the proofs, then one ?nds that many results bene?t in some way from the positivity preserving property. Techniques based on Harnack's inequality, De Giorgi-Nash- Moser's iteration, viscosity solutions etc.…

Codice articolo LU-9783642122446

Titolo
Polyharmonic Boundary Value Problems
Autore
Filippo Gazzola, Hans-Christoph Grunau, Guido Sweers
Editore
Springer-Verlag Berlin and Heidelberg GmbH and Co. KG, DE
Anno di pubblicazione
2010
Condizione
New
Rilegatura
Paperback
Lingua
inglese
ISBN 10
3642122442
ISBN 13
9783642122446
Edizione
2010 ed.

Rarewaves.com USA

London, London, Regno Unito

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