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International Mathematics Research Notices (2012) 10.1093/imrn/rns119
The Euclidean Onofri inequality in higher dimensions
Manuel Del Pino 1, Jean Dolbeault 2
(31/12/2012)

The classical Onofri inequality in the two-dimensional sphere assumes a natural form in the plane when transformed via stereographic projection. We establish an optimal version of a generalization of this inequality in the d-dimensional Euclidean space for any d≥2, by considering the endpoint of a family of optimal Gagliardo-Nirenberg interpolation inequalities. Unlike the two-dimensional case, this extension involves a rather unexpected Sobolev-Orlicz norm, as well as a probability measure no longer related to stereographic projection.
1 :  Departamento de Ingeniería Matemática [Santiago] (DIM)
Departamento de Ingeniería Matemática – Universidad de Chile
2 :  CEntre de REcherches en MAthématiques de la DEcision (CEREMADE)
CNRS : UMR7534 – Université Paris IX - Paris Dauphine
Mathématiques/Equations aux dérivées partielles
Sobolev inequality – logarithmic Sobolev inequality – Onofri inequalities – Gagliardo-Nirenberg inequalities – interpolation – extremal functions – optimal constants – stereographic projection
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