Apply df_mend__df_sdrg__df_cytp__df_topsep__df_toplnd__df_rcl__df_he__ax_frege1__ax_frege2__ax_frege8__ax_frege28__ax_frege31__ax_frege41__ax_frege52a__ax_frege54a__ax_frege58a__ax_frege52c__ax_frege54c with
∀ x0 x1 : ι → ο . wb (whe x0 x1) (wss (cima x1 x0) x0).