proposition: Lemma comp_coequalizer_eq : forall a u v, has_coequalizer a u v -> comp a (coequalizer a u v) u = comp a (coequalizer a u v) v.
proof: Proof. ir. cp (coequalizer_hypothesis_coequalizer H). uh H0; ee. am. Qed.
imports: Arith colimits little_cat fc_limits cardinal