Definition MorphismPair_opp {C : precategory} (MP : @MorphismPair C) : @MorphismPair (opp_precat C). Proof. use make_MorphismPair. - exact (Ob3 MP). - exact (Ob2 MP). - exact (Ob1 MP). - exact (Mor2 MP). - exact (Mor1 MP). Defined.
Require Import UniMath.Foundations.PartD. Require Import UniMath.Foundations.Propositions. Require Import UniMath.Foundations.Sets. Require Import UniMath.MoreFoundations.Notations. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.opp_precat. Require Import UniMath.CategoryTheory.Limits.Zero. Require Import UniMath.CategoryTheory.Limits.Opp.