Apply df_mndo__df_ghomOLD__df_rngo__df_drngo__df_rngohom__df_rngoiso__df_risc__df_com2__df_fld__df_crngo__df_idl__df_pridl__df_maxidl__df_prrngo__df_dmn__df_igen__df_xrn__df_coss with
∀ x0 x1 : ι → ο . wceq (cxrn x0 x1) (cin (ccom (ccnv (cres c1st (cxp cvv cvv))) x0) (ccom (ccnv (cres c2nd (cxp cvv cvv))) x1)).