國立清華大學 數學系

參考連結
https://sites.google.com/view/sgsnthu/home

Abstract:
For regular foliations, neighborhoods of leaves are classified by a group morphism from the fundamental group of the leaf to the group of local diffeomorphisms of the transversal. For singular foliations and singular leaves, it is much more involved. Still, there are many cases where there are not that many possible neighborhoods, even wide classes of singular leaves for which the classification is a finite dimensional problem. We will present a classification of formal neighborhoods of singular leaves in full generality, and address the question: how wide a class is it?  Joint works with Leonid Ryvkin Simon Raphaël Fischer.