Asymptotic behavior of solutions of semilinear elliptic equations in unbounded domains: two approaches

Details Asymptotic behavior of solutions of semilinear elliptic equations in unbounded domains: two approaches Asymptotic behavior of solutions of semilinear elliptic equations in unbounded domains: two approaches

2010-07-22

arxiv.org/abs/1007.3921v1

Mathematics

Analysis of PDEs

Scientific paper

In this paper, we study the asymptotic behavior as $x_1\to+\infty$ of solutions of semilinear elliptic equations in quarter- or half-spaces, for which the value at $x_1=0$ is given. We prove the uniqueness and characterize the one-dimensional or constant profile of the solutions at infinity. To do so, we use two different approaches. The first one is a pure PDE approach and it is based on the maximum principle, the sliding method and some new Liouville type results for elliptic equations in the half-space or in the whole space~$\mathbb{R}^N$. The second one is based on the theory of dynamical systems.

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