Generalized Penner coordinates and the deformed Farey triangulation

by Boris Springborn (TU Berlin)

Wednesday Sep 2, 2026, 1:30 PM → 2:30 PM Europe/Paris

Salle Fokko du Cloux (Bat. Braconnier)

Generalizing Penner coordinates to ideal triangulations of hyperbolic surfaces with geodesic boundary instead of cusps provides a different geometric perspective on the deformed Farey triangulation and the deformed rationals introduced by Morier-Genoud and Ovsienko.