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Waves, gravitation and geometry
Isolated systems, asymptotics and the structures on null-infinity
Isolated systems, asymptotics and the structures on null-infinity
Organizers
Lars Andersson
,
Haiming Du
, Pin Yu
Speaker
Joerg Frauendiener
Time
Wednesday, April 9, 2025 10:30 AM - 12:00 PM
Venue
Jingzhai-105
Online
Zoom 518 868 7656
(BIMSA)
Abstract
The idea of an isolated system is fundamental in physics, particularly in GR. Mathematically, it is realized as an asymptotically flat space-time. Penrose's geometric insights allow us to conformally compactify such a space-time by introducing a conformal boundary called null-infinity. It is a null hyper-surface which inherits many properties of Minkowski space and on which the non-linear fields of the space-time leave many interesting "imprints. In this series of talks, I will discuss the foundations of null-infinity, introduce the structures thereon and point to open problems.
This is the fourth of a series of talks on isolated systems in General Relativity.
This is the fourth of a series of talks on isolated systems in General Relativity.
Speaker Intro
Joerg Frauendiener received his PhD at the University of Tuebingen. His research interests are applications of geometric methods in the natural sciences. More specifically, he worked on mathematical and numerical issues in General Relativity. Most recently, he developed a computational framework based on Penrose's idea of conformal compactification for analysing global properties of asymptotically flat space-times using Friedrich's conformal field equations. He has held visiting positions in Krakow, Oslo, Dijon, and Paris. He is Chair of Applied Mathematics at the University of Otago in New Zealand since 2007.