emap_inv' {A B : Type} `{HasEquivs A} `{HasEquivs B} (F : A -> B) `{!Is0Functor F, !Is1Functor F} {a b : A} (e : a $<~> b) : cate_fun (emap F e)^-1$ $== fmap F e^-1$ := emap_inv F e $@ cate_buildequiv_fun _.
Require Import Basics.Utf8 Basics.Overture Basics.Tactics Basics.Equivalences. Require Import WildCat.Core. Require Import WildCat.Opposite.