proposition: Lemma target_fipr2 : forall a u v, has_fiprod a u v -> target (fipr2 a u v) = source v.
proof: Proof. ir. cp (is_fiprod_fiprod H). uh H0; ee. uh H0; ee. sy; am. Qed.
imports: Arith colimits little_cat fc_limits cardinal