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Accueil > Séminaires > Séminaire doctorant

Séminaire doctorant

Plan d’accès

Le séminaire doctorant a lieu le vendredi à 15h00 en salle 316Bbis.

Responsables :
Johann Cuenin, Michel Duprez et Michaël Ulrich

Exposé à venir

Vendredi 24 octobre : Antoine Godichon
(Université de Bourgogne)

Efficient recursive estimation of the geometric median in Hilbert spaces : new results

With the development of automatic sensors, it is more and more usual to study large samples of observations taking values in high dimensional spaces such as functional spaces. In this framework, the geometric median, which is a generalization of the real median for metric spaces, is an interesting robust location parameter. Two recursive estimators will be considered. Some results were given on the almost sure convergence of the stochastic gradient estimator and on the asymptotic normality of the averaged version. First, some new results on the L2 rates of convergence of the algorithms are given. Finally, using some exponential inequalities for the martingale differences, asymptotic confidence intervals will be given.



Archives

Vendredi 3 octobre : Bruno Winckler (Université de Bordeaux)

Intersection arithmétique