The upcoming talk
At the next session of the TCS,
on the 22nd of May 2024,
at 2:15 – 3:15 p.m. CET / 3:15 – 4:15 p.m. EET
Maciej Dunajski (University of Cambridge)
shall talk about
“Quasi-Einstein metrics”.
Abstract
We prove that the intrinsic Riemannian geometry of compact cross-sections of any Einstein extremal horizon must admit a Killing vector field. This establishes the rigidity theorem for the extremal Kerr black hole horizon. This extremal horizon is a special case of a quasi-Einstein structure. We shall discuss other examples of quasi-Einstein structures on compact surfaces, including a global result relevant in projective metrizability.
(All seminar talks are given on the online zoom platform. The web link for every session is circulated via the TCS mailing list. In order to be enlisted, please contact the Organisers.)
Calendar
| Date | Speaker (affiliation) | Title (with a link to the slides, whenever available) |
| June 19th, 2024 | Cornelia Vizman (Universitatea de Vest din Timișoara) | TBA |
| June 12th, 2024 | Wojciech Kamiński (IFT WFUW) | TBA |
| June 5th, 2024 | Eugen Cioroianu (Universitatea din Craiova) | TBA |
| May 29th, 2024 | Oleksii Kotov (Univerzita Hradec Králové) | TBA |
| May 22th, 2024 | Maciej Dunajski (University of Cambridge) | Quasi-Einstein metrics |
| May 15th, 2024 | Calin I. Lazaroiu (IFIN-HH & UNED) | Weakly Abelian gauge theories |
| May 8th, 2024 | Javier de Lucas Araujo (KMMF WFUW) | The local classification of finite-dimensional Lie algebras of analytic Hamiltonian vector fields on the plane |
| May 1st, 2024 | Ø (holiday) | Ø |
| April 24th, 2024 | Daniel Beltiţă (IMAR) | Lie group representations and standard subspaces of Hilbert spaces |
| April 17th, 2024 | Rafał R. Suszek (KMMF WFUW) | 1001 Tricks with Character(s) – A Case for Simplicial Mechanics stitched by Categorified Correspondences |
| April 10th, 2024 | Stefan Carstea (IFIN-HH) | Discrete integrable dynamical systems: geometry of invariants and symmetries |
| March 27th, 2024 | Katarzyna Grabowska (KMMF WFUW) | Algebroids – a playground for geometric mechanics |
| March 20th, 2024 | Janusz Grabowski (IMPAN) | Homogeneity and formalisms of mechanics |
| March 13th, 2024 | Radu Purice (IMAR) | Some results in the spectral analysis of quantum Hamiltonians with magnetic fields |
| March 6th, 2024 | Vasile Brînzănescu (IMAR) | Algebraic Geometry at IMAR: past and present research |