fact: Definition whiteheads_principle {ua : Univalence} {A B : Type} {f : A -> B} (n : trunc_index) {H0 : IsTrunc n A} {H1 : IsTrunc n B} {i : IsEquiv (Trunc_functor 0 f)} {ii : forall (x : A) (k : nat), IsEquiv (fmap (Pi k.+1) (pmap_from_point f x)) } : IsEquiv f.
imports: Basics Types Pointed WildCat.Core HFiber Truncations Algebra.Groups.Group Homotopy.HomotopyGroup