Time: 16:30-18:00

Location: Mondi 2

Speaker 1: Jonas Ingmanns (Fischer group)

Title: Homogenization of Interface Motions through a Random Field of Obstacles

Abstract: In the field of homogenization, we are interested in describing effective large scale properties of random or periodic heterogeneous environments. In this talk, I will present a result for the effective large scale speed of a phase spreading through a random field of obstacles. Here, the interface of the phase evolves by forced mean curvature flow, which I will introduce.

Speaker 2:  Daniel Holmes (Hausel group)

Title: Fixed points and the localization theorem

Abstract: After a quick review of equivariant cohomology, I will discuss the Atiyah-Bott localization theorem, a useful computational and conceptual tool in geometry and topology. I will show examples ranging from projective space and counting lines on cubic surfaces to computing Gromov-Witten invariants of GKM spaces in terms of decorated trees.