fact: Definition make_isZero (c : C) (H : (∏ (d : C), iscontr (c --> d)) × (∏ (d : C), iscontr (d --> c))) : isZero c := make_isInitial c (dirprod_pr1 H),,make_isTerminal c (dirprod_pr2 H).
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Limits.Graphs.Colimits UniMath.CategoryTheory.Limits.Graphs.Limits UniMath.CategoryTheory.Limits.Graphs.Initial UniMath.CategoryTheory.Limits.Graphs.Terminal UniMath.CategoryTheory.Limits.Zero