proposition: Lemma quotient_times {G} {X:Torsor G} (y x:X) : (y/x)*x = y.
proof: Proof. intros. exact (pr2 (iscontrpr1 (is_quotient _ y x))). Defined.
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