Sharp Adams-Moser-Trudinger type inequalities in the hyperbolic space

Abstract

The purpose of this paper is to establish some Adams-Moser-Trudinger inequalities, which are the borderline cases of the Sobolev embedding, in the hyperbolic space ${\mathbb{H}}^n$. First, we prove a sharp Adams inequality of order two with the exact growth condition in ${\mathbb{H}}^n$. Then we use it to derive a sharp Adams-type inequality and an Adachi-Tanaka-type inequality. We also prove a sharp Adams-type inequality with Navier boundary condition on any bounded domain of ${\mathbb{H}}^n$, which generalizes the result of Tarsi to the setting of hyperbolic spaces. Finally, we establish a Lions-type lemma and an improved Adams-type inequality in the spirit of Lions in ${\mathbb{H}}^n$. Our proofs rely on the symmetrization method extended to hyperbolic spaces.

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