低次元トポロジーセミナー


2017/7/4(Tue)

10:30--12:00 数学教室 新セミナー室(D505)

Todd Drumm

Howard University

Affine Deformations of Lorentzian Space-times

There is a deep connection between Lorentzian space-times and (open) hyperbolic surfaces. In particular, the relationship between certain deformations of a hyperbolic surface and the affine deformations of the underlying hyperbolic surface will be investigated. We will use techniques of Goldman-Margulis and Danciger-Gueritaud-Kassel to explore the link between Crooked Planes, a Lorentzian analog of a bisector, and strip deformations of hyperbolic surfaces.