11-52 Alberto Farina, Enrico Valdinoci

On partially and globally overdetermined problems of elliptic type (347K, pdf) Mar 29, 11

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Abstract. We consider some elliptic PDEs with Dirichlet and Neumann data prescribed on some portion of the boundary of the domain and we obtain rigidity results that give a classification of the solution and of the domain. In particular, we find mild conditions under which a partially overdetermined problem is, in fact, globally overdetermined: this enables to use several classical results in order to classify all the domains that admit a solution of suitable, general, partially overdetermined problems. These results may be seen as solutions of suitable inverse problems -- that is to say, given that an overdetermined system possesses a solution, we find the shape of the admissible domains. Models of these type arise in several areas of mathematical physics and shape optimization.

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