Geometry and Topology colloquium


2025-10-22 14:15: Post-critically finite maps (Thomas Gauthier, Université Paris-Saclay)

2025-10-22 16:00: An exotic Dehn twist after two stabilizations (Sungkyung Kang (Cambridge))

2025-11-19 14:15: A Hopf index for isotropic sections of bundles with quadratic forms (Richard Thomas, Imperial College London.)

2025-11-19 16:00: Symplectic groups and Cobordism categories (Fabian Hebestreit (Bielefeld))

2026-02-11 14:15: Resonance and Chen ranks in geometry (Gavril Farkas, HU Berlin)

2026-02-11 16:00: Random covering spaces of closed surfaces are near-optimal expanders (Michael Magee (Durham))

2026-03-11 14:15: Moduli of K3 sufaces and enumerative geometry (Rahul Pandharipande (Eidgenössische Technische Hochschule Zürich))

2026-03-11 16:00: Floer homotopy and bordism (Ivan Smith (Cambridge))

2026-05-06 14:15: Title to be confirmed (Mihnea Popa (Harvard))

2026-05-06 16:00: Title to be confirmed (Laura DeMarco (Harvard))