Symmetry for a quasilinear elliptic equation in Hyperbolic space
Ramya Dutta, Sandeep Kunnath
TL;DR
The paper studies radial symmetry, decay, and existence for a quasilinear $p$-Laplacian equation on hyperbolic space, viewing it as the Euler-Lagrange equation for the Poincaré-Sobolev inequality on $(\mathbb{H}^n,g)$. It develops a hyperbolic moving plane approach complemented by sharp decay estimates obtained through sub- and super-solution constructions and Picone identities, plus a classification of positive eigenfunctions for the associated eigenvalue problem on $\mathbb{H}^n$. Key contributions include the exponential decay of solutions and their gradients, the full hyperbolic symmetry of positive solutions, and existence/nonexistence results in subcritical and critical regimes, extending Euclidean symmetry theory to negatively curved spaces. These results provide sharp constants and extremal profiles for Poincaré-Sobolev inequalities in noncompact geometries, with potential implications for geometric analysis and nonlinear PDE in hyperbolic settings.$
Abstract
In this article we establish the radial symmetry of positive solutions of a p- Laplace equation in the Hyperbolic space, which is the Euler Lagrange equation of the p- Poincare Sobolev inequality in the Hyperbolic space. We will also establish the sharp decay of solution and its gradient and also investigate the question of existence of solution.
