Delaunay type domains for an overdetermined elliptic problem in ${𝕊}^n\times ℝ$ and ${ℍ}^n\times ℝ$

Morabito, Filippo^1, 2 ; Sicbaldi, Pieralberto³ 

¹ KAIST, Korea Advanced Institute of Science and Technology, Department of Mathematical Sciences, 291 Daehak-ro, Yuseong-gu, 305701, Daejeon, South Korea
² Korea Institute for Advanced Study, School of Mathematics, 87 Hoegi-ro, Dongdaemun-gu, 130-722, Seoul, South Korea
³ Aix-Marseille Université, CNRS – Ecole Centrale Marseille, I2M, UMR 7373, 13453 Marseille, France

ESAIM: Control, Optimisation and Calculus of Variations, Tome 22 (2016) no. 1, pp. 1-28

Résumé

We prove the existence of a countable family of Delaunay type domains

$$\begin{array}{c}\hfill {\Omega }_t\subset {𝕄}^n\times ℝ,\end{array}$$

$t\in \mathbb{N}$, where ${𝕄}^n$ is the Riemannian manifold ${𝕊}^n$ or ${ℍ}^n$ and $n\ge 2$, bifurcating from the cylinder $B^n\times ℝ$ (where $B^n$ is a geodesic ball in ${𝕄}^n$) for which the first eigenfunction of the Laplace–Beltrami operator with zero Dirichlet boundary condition also has constant Neumann data at the boundary. In other words, the overdetermined problem

$$\begin{array}{c}\hfill \left\{\begin{array}{cc}{\Delta }_{g}u+\lambda u=0\hfill & \text{in}{\Omega }_t\hfill \\ u=0\hfill & \text{on}\partial {\Omega }_t\hfill \\ g(\nabla u,\nu )=\text{const.}\hfill & \text{on}\partial {\Omega }_t\hfill \end{array}\right.\end{array}$$

has a bounded positive solution for some positive constant $\lambda$, where $g$ is the standard metric in ${𝕄}^n\times ℝ$. The domains $\Omega {}_t$ are rotationally symmetric and periodic with respect to the $ℝ$-axis of the cylinder and the sequence ${\left\{\Omega {}_t\right\}}_t$ converges to the cylinder $B^n\times ℝ$.

Détail

DOI : 10.1051/cocv/2014064

Classification : 58J32, 58J05, 58J55, 53C30, 53A10, 35B32, 35R01, 49Q05, 49Q10, 33CXX
Keywords: Overdetermined elliptic problems, homogeneous manifolds, bifurcation, Laplace–Beltrami operator, Delaunay surfaces