fact: Definition MPComm1 {MP1 MP2 : MorphismPair} {MPM : MPMorMors MP1 MP2} (MPMC : MPMorComms MPM) : MPMor1 MPM · Mor1 MP2 = Mor1 MP1 · MPMor2 MPM := dirprod_pr1 MPMC.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.Notations UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.opp_precat UniMath.CategoryTheory.Limits.Zero UniMath.CategoryTheory.Limits.Opp