proposition: Lemma castTorsor_transportf {G} {T T':Torsor G} (q:T = T') (t:T) : transportf (λ S, underlyingAction S) q t = castTorsor q t.
proof: Proof. now induction q. 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