{A B} `{Is1Gpd A, Is1Gpd B, !HasMorExt B} (F : A -> B) `{!Is0Functor F, !Is1Functor F} {a0 a1 : A} (f : a0 $== a1) : fmap F f^$ = (fmap F f)^$ := path_hom (gpd_1functor_V F f).
Require Import Basics.Overture Basics.Tactics.