Thu, 15 Oct 2026
13:30
13:30
L5
The hyperboloid at timelike infinity and conformal geodesics
Mariem Magdy
(Perimeter Institute)
Abstract
In this talk, I will discuss ongoing work in which we use conformal geodesics to construct an extended representation of timelike infinity in Minkowski and Schwarzschild spacetimes. This construction relies on a key property of conformal geodesics: every non-null metric geodesic in an Einstein spacetime is, up to an explicit local reparametrisation, also a conformal geodesic. If time permits, I will also briefly discuss some properties of the transport equation governing scalar fields on future null infinity and particularly the asymptotic behaviour of its solutions near timelike infinity. This talk is based on work in collaboration with Juan A. Valiente-Kroon (Queen Mary University of London) and Achilleas Vasileios Koukas (Princeton University).
We are pleased to announce that the awards for Contributions to the Department in 2025-26 are made to the following graduate students.
Mario Marcos Losada: For his contributions in organising the Junior Algebra and Representation Theory Seminar, running Prelims Corner and supporting outreach activities. He has also been a dedicated mentor to first-year undergrads and newer DPhil students with an exemplary approach to delivering quality teaching.