A generalized Blakers-Massey theorem

Nom de l'orateur
Georg Biedermann (Paris)
Etablissement de l'orateur
LAGA, Paris 13
Date et heure de l'exposé
Lieu de l'exposé
Salle Eole

(joint with M. Anel, E. Finster, and A. Joyal) We present a generalization of the Blakers-Massey theorem for higher topoi. The main tool are "modalities", unique factorization systems whose left class is closed under homotopy base change. As an application we prove a Blakers-Massey type theorem for the Goodwillie tower of a homotopy functor.