proposition: Lemma isiso_from_Terminal_to_Terminal (T T' : Terminal) : is_iso (TerminalArrow T (TerminalObject T')).
proof: Proof. apply (is_iso_qinv _ (TerminalArrow T' (TerminalObject T))). split; apply pathsinv0, TerminalEndo_is_identity. Defined.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.Tactics UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Limits.Graphs.Colimits UniMath.CategoryTheory.Limits.Graphs.Limits UniMath.CategoryTheory.Limits.Terminal