Apply df_ec__df_qs__df_map__df_pm__df_ixp__df_en__df_dom__df_sdom__df_fin__df_fsupp__df_fi__df_sup__df_inf__df_oi__df_har__df_wdom__ax_reg__ax_inf with
∀ x0 x1 x2 : ι → ο . wceq (csup x0 x1 x2) (cuni (crab (λ x3 . wa (wral (λ x4 . wn (wbr (cv x3) (cv x4) x2)) (λ x4 . x0)) (wral (λ x4 . wbr (cv x4) (cv x3) x2 ⟶ wrex (λ x5 . wbr (cv x4) (cv x5) x2) (λ x5 . x0)) (λ x4 . x1))) (λ x3 . x1))).