Events

Date: 27 January 2026   Time: 14:30 - 15:30

Location: MB503

NOTE: Pre talk intro for non experts starts at 2pm, with seminar starting at 2.30pm

Title: Spacetime extensions in low regularity

Abstract: It has been shown that the interior of a dynamical black hole (of the sort believed to occur in nature) contains a Cauchy horizon to which the spacetime metric extends continuously. However, Penrose's strong cosmic censorship conjecture states that in any such extension, the Christoffel symbols should fail to be locally square integrable (and consequently evolution via the Einstein equations must break down). Motivated by proving such an inextendibility statement, I will discuss recent work with Jan Sbierski where we study the uniqueness of continuous spacetime extensions in 1+1 dimensions.

I will also give a short introductory talk with some background on Lorentzian manifolds, general relativity and the strong cosmic censorship conjecture.