An Introduction to the Regularity Theory for Elliptic Systems, Harmonic Maps and Minimal Graphs
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Sprache:Englisch
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Verlag:Edizioni della Normale
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Beschreibung
Produktdetails
Einband
Taschenbuch
Erscheinungsdatum
23.11.2012
Verlag
Edizioni della NormaleSeitenzahl
370
Maße (L/B/H)
23,5/15,5/2,1 cm
Gewicht
581 g
Auflage
2nd edition 2013
Sprache
Englisch
ISBN
978-88--7642442-7
19th problem: Are the solutions to regular problems in the Calculus of Variations always necessarily analytic?
20th problem: does any variational problem have a solution, provided that certain assumptions regarding the given boundary conditions are satisfied, and provided that the notion of a solution is suitably extended?
During the last century these two problems have generated a great deal of work, usually referred to as regularity theory, which makes this topic quite relevant in many fields and still very active for research.
However, the purpose of this volume, addressed mainly to students, is much more limited. We aim to illustrate only some of the basic ideas and techniques introduced in this context, confining ourselves toimportant but simple situations and refraining from completeness. In fact some relevant topics are omitted.
Topics include: harmonic functions, direct methods, Hilbert space methods and Sobolev spaces, energy estimates, Schauder and L^p-theory both with and without potential theory, including the Calderon-Zygmund theorem, Harnack's and De Giorgi-Moser-Nash theorems in the scalar case and partial regularity theorems in the vector valued case; energy minimizing harmonic maps and minimal graphs in codimension 1 and greater than 1.
In this second deeply revised edition we also included the regularity of 2-dimensional weakly harmonic maps, the partial regularity of stationary harmonic maps, and their connections with the case p=1 of the L^p theory, including the celebrated results of Wente and of Coifman-Lions-Meyer-Semmes.
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