Abhay Ashtekar (Pennsylvania State University)
Title: The many faces of black hole horizons
Abstract: Black hole horizons provide an outstanding illustration of the interplay between geometry and physics. Their rich structure has drawn attention of mathematicians, general relativists, quantum field theorists, particle theorists, theoretical astrophysicists and astronomers. Their physical reality is now well established through gravitational wave astronomy and the event horizon telescope. They have features that are both fascinating and vexing. The talk will provide a few examples of the advances that have brought their counter-intuitive properties to the forefront.