Asymptotics for sharp Sobolev-Poincaré inequalities on compact Riemannian manifolds
Asymptotics for sharp Sobolev-Poincaré inequalities on compact Riemannian manifolds
Given $(M,g)$ a smooth compact Riemannian manifold of dimension $n \ge 3$, there exist $A, B > 0$ such that for any $u \in H_1^2(M)$, $$\Vert u\Vert_{2^\star}^2 \le A\Vert\nabla u\Vert_2^2 + B\Vert u\Vert_1^2 , $$ where $H_1^2(M)$ is the standard Sobolev space consisting of functions in $L^2(M)$ whose gradient is …