Seminar series
Date
Mon, 09 Mar 2026
15:30
15:30
Location
L5
Speaker
Sam Hughes
Organisation
Rheinische Friedrich-Wilhelms-Universität Bonn
A quasihomomorphism is a map that satisfies the homomorphism relation up to bounded error. Fujiwara and Kapovich proved a rigidity result for quasihomomorphisms taking values in discrete groups, showing that all quasihomomorphisms can be built from homomorphisms and sections of bounded central extensions. We study quasihomomorphisms with values in real linear algebraic groups, and prove an analogous rigidity theorem. Based on joint work with Sami Douba, Francesco Fournier Facio, and Simon Machado.