Congratulations to Chettha Saelim for passing his PhD Confirmation viva! It was held on Monday 14 October, and his examiners were Andrea Prinsloo and Alessandro Torrielli. The title of his report is “Deformations of Black Holes from an L-infinity Algebra Perspective”. The project is to encode deformation data of a near horizon geometry of an extremal black hole in terms of L_infinity algebra and the Maurer-Cartan equation. His supervisors are Martin Wolf (primary) and Jan Gutowski (co-supervisor). Image credit (link here).