Serrin-Type Overdetermined Problem in $\mathbb H^n$
DOI:
https://doi.org/10.4208/jpde.v36.n1.7Keywords:
Overdetermined problems;hyperbolic space;P functions;Rellich-Pohozaev identity.Abstract
In this paper, we prove the symmetry of the solution to overdetermined problem for the equation $\sigma_k(D^2u-uI)=C_n^k$ in hyperbolic space. Our approach is based on establishing a Rellich-Pohozaev type identity and using a $P$ function. Our result generalizes the overdetermined problem for Hessian equation in Euclidean space.