fact: Definition category_isotoid {s d : category F} : s = d <~> (s <~=~> d)%category.
imports: Category.Core Functor.Core Category.Univalent Category.Morphisms SetCategory.Core Grothendieck.ToSet.Core Grothendieck.ToSet.Morphisms HoTT.Basics.Equivalences HoTT.Basics.Trunc HoTT.Types.Universe HoTT.Types.Sigma