QG group meeting: null hypersurface geometry

This is the weekly QG group meeting.

Speaker: Yasha Neiman (black shirt).
Title: Introduction to the geometry of null hypersurfaces

I will talk about the metric, extrinsic curvature and parallel transport on null hypersurfaces, such as event horizons. This was the technical underpinning of much of my Ph.D. work on black hole hydrodynamics.