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no yellow on co-Contravariant Functor
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 28 Aug 2013 11:41:17 +0900
parents 3249aaddc405
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module category-ex where

open import Level
open import Category
postulate c₁ c₂ ℓ : Level
postulate A : Category c₁ c₂ ℓ

postulate a b c : Obj A
postulate g : Hom A a b
postulate f : Hom A b c

open Category.Category

h = _o_  A f g

i = A [ f o g ]