Solutions to overdetermined elliptic problems in nontrivial exterior domains
Abstract
In this paper we construct nontrivial exterior domains $\Omega \subset \mathbb{R}^N$, for all $N\geq 2$, such that the problem $$\left\{ {ll} -\Delta u +u -u^p=0,\ u >0 & \mbox{in }\; \Omega, {1mm] \ u= 0 & \mbox{on }\; \partial \Omega, [1mm] \ \frac{\partial u}{\partial \nu} = \mbox{cte} & \mbox{on }\; \partial \Omega, \right.$$ admits a positive bounded solution. This result gives a negative answer to the Berestycki-Caffarelli-Nirenberg conjecture on overdetermined elliptic problems in dimension 2, the only dimension in which the conjecture was still open. For higher dimensions, different counterexamples have been found in the literature; however, our example is the first one in the form of an exterior domain.
- Publication:
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arXiv e-prints
- Pub Date:
- September 2016
- DOI:
- 10.48550/arXiv.1609.03739
- arXiv:
- arXiv:1609.03739
- Bibcode:
- 2016arXiv160903739R
- Keywords:
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- Mathematics - Analysis of PDEs