proposition: Lemma iscontrweqb' {X Y} (is:iscontr Y) (w:X ≃ Y) : iscontr X.
proof: Proof. intros. apply (iscontrweqb (Y:=Y)). assumption. assumption. Defined.
imports: UniMath.Foundations.All UniMath.Foundations.Sets UniMath.Foundations.UnivalenceAxiom