Laboratoire de Mathématiques Raphaël Salem

UMR 6085 CNRS - Université de Rouen Normandie

The first question of optimization is whether some function admits a minimum over some space. The family of Ekeland principles adresses the question "what can we say when there is no minimum?" This talk will present the original principle and some variants in an elementary fashion, with hope to highlight the power of this elegant theory.