fact: Definition pr1_GH_weq {Y} {y:Y} {l:y = y} : (GH l) ≃ (Torsor ℤ) := weqpr1_irr_sec (irr l) (sec l).
imports: UniMath.Foundations.All UniMath.MoreFoundations.PartA UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.NumberSystems.Integers UniMath.SyntheticHomotopyTheory.AffineLine UniMath.Algebra.GroupAction UniMath.MoreFoundations.MoreEquivalences