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X-WR-CALDESC:Évènements pour Laboratoire de Mathématiques de Versailles
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DTSTART;TZID=Europe/Paris:20260109T100000
DTEND;TZID=Europe/Paris:20260109T110000
DTSTAMP:20260412T021400
CREATED:20250818T122054Z
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SUMMARY:PS : Badr-Eddine Cherief Abdellatif (LPSM\, Sorbonne Université) : On Bayesianism and Predictive Uncertainty: Predictively Oriented (PrO) Posteriors
DESCRIPTION:In this talk\, we will present a new statistical principle that combines the most desirable aspects of both parameter inference and density estimation. This leads us to the PrO posterior\, which expresses uncertainty as a consequence of predictive ability. Doing so leads to inferences which predictively dominate both classical and generalised Bayes posterior predictive distributions. Our PrO posteriors adapt to the level of model misspecification: they concentrate around the true model in the same way as Bayes and Gibbs posteriors if the model can recover the data-generating distribution\, but do not concentrate toward a single parameter in the presence of non-trivial forms of model misspecification. Instead\, they stabilise towards a predictively optimal posterior whose degree of irreducible uncertainty admits an interpretation as the degree of model misspecification—a sharp contrast to how Bayesian uncertainty and its existing extensions behave.
URL:https://lmv.math.cnrs.fr/evenenement/ps-badr-eddine-cherief-abdellatif-lpsm-sorbonne-universite/
LOCATION:Bâtiment Fermat\, salle 4205
CATEGORIES:Séminaire PS
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DTSTART;TZID=Europe/Paris:20260109T111500
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DTSTAMP:20260412T021400
CREATED:20250818T122423Z
LAST-MODIFIED:20260106T101333Z
UID:14297-1767957300-1767960900@lmv.math.cnrs.fr
SUMMARY:PS : Steffen Grünewälder (University of York) : Mesure Empirique Compressée
DESCRIPTION:Je présenterai une approche visant à compresser la mesure empirique tout en préservant les vitesses de convergence dans le contexte des méthodes à noyau. Je donnerai d’abord une vue d’ensemble de l’idée\, avant de démontrer deux résultats clés.
URL:https://lmv.math.cnrs.fr/evenenement/ps-steffen-grunewalder-university-of-york/
LOCATION:Bâtiment Fermat\, salle 4205
CATEGORIES:Séminaire PS
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