Definition triviality_isomorphism {G:gr} (X:Torsor G) (x:X) : ActionIso (trivialTorsor G) X. Proof. intros. exact (torsor_mult_weq X x,, univ_function_is_equivariant X x). Defined.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.Propositions. Require Import UniMath.MoreFoundations.Notations. Require Import UniMath.MoreFoundations.Univalence. Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.Algebra.Monoids. Require Import UniMath.Algebra.Groups. Require Import UniMath.OrderTheory.OrderedSets.OrderedSets. Import UniMath.MoreFoundations.PartA.