Speaker: Akio Tamagawa (RIMS, Kyoto University)
Title: The algebraic and anabelian geometry of configuration spaces (joint work with Shinichi Mochizuki)

Abstract : In this talk, we study profinite and pro-l fundamental groups of configuration spaces of hyperbolic curves (defined over algebraically closed fields of characteristic zero). In particular, we show that, in many cases, the ``fiber subgroups'' of such fundamental groups arising from the various natural projections of a configuration space to lower-dimensional configuration spaces may be characterized group-theoretically.