Colloquium du Ceremade (Rupert Frank, mardi 6 mai 2025)

Le prochain Colloquium du Ceremade est prévu le mardi 6 mai à 15h30 en salle A709 avec l'intervention de Rupert Frank (Ludwig Maximilians Universität München).

Title : Sharp functional inequalities and their stability

Abstract 
The Sobolev inequality is a paradigmatic example of a functional inequality with many applications in the Calculus of Variations, Geometric Analysis and PDEs. In some of these applications the optimal value of the constant is of importance, as is a characterization of the set of optimizers. The stability question is whether functions whose Sobolev quotient is almost minimal are close to minimizers of the inequality and, if so, in which sense. We give a gentle introduction to this question and review some recent results on the Sobolev inequality and other functional inequalities of a similar nature.