fact: Definition isexact_homotopic_f n {F X Y : pType} (i : F ->* X) {f f' : X ->* Y} (ff : f' ==* f) `{IsExact n F X Y i f} : IsExact n i f'.
imports: Basics Types SuccessorStructure WildCat Pointed Modalities.Identity Modalities.Descent Truncations HFiber ObjectClassifier