Orateur
Robert Yuncken
(Université de Lorraine)
Description
Many constructions in representation theory and index theory are based upon elliptic differential operators. The work of Julg and Kasparov shows that subelliptic differential operators, such as the Berstein-Gelfand-Gelfand complex, are often required to make certain key constructions. In this talk, we will describe the tangent groupoid associated a very general class of such operators, namely operators of Helffer-Nourrigat type. Generalising ideas of Connes and Debord-Skandalis then allows us to prove the analytic properties of such operators.
(Joint work with Iakovos Androulidakis, Omar Mohsen and Erik Van Erp.)
https://sites.google.com/view/julgfest
