fact: Definition quotient {G} (X:Torsor G) (y x:X) := pr1 (iscontrpr1 (is_quotient X y x)) : G.
imports: UniMath.Foundations.All UniMath.MoreFoundations.Propositions UniMath.MoreFoundations.Notations UniMath.MoreFoundations.Univalence UniMath.MoreFoundations.Tactics UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.Combinatorics.OrderedSets