proposition: Lemma iscontr_EG (G:gr) : iscontr (E G).
proof: Proof. intros. exists (pointedTrivialTorsor G). intros [X x]. apply pathsinv0. apply (invweq Pointedtorsor_univalence). apply pointed_triviality_isomorphism. 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