45:51
published on October 13, 2026
Deformations of graded gentle algebras and Fukaya categories of surfaces
By Barmeier Severin
Poincaré inequalities for differential forms on Heisenberg group
By Pierre Pansu
Appears in collection : Journée sous-riemannienne 2017
Every closed differential form ω on a Euclidean ball has a primitive whose Lq norm is bounded by the Lp norm of ω (for suitable exponents p and q). We prove an analogous result for Rumin’s exterior differential on Heisenberg balls. This is used to prove vanishing of `q,p-cohomology of Heisenberg groups. Joint work with Annalisa Baldi and Bruno Franchi.
