Apply df_vrgp__df_cmn__df_abl__df_cyg__df_dprd__df_dpj__df_mgp__df_ur__df_srg__df_ring__df_cring__df_oppr__df_dvdsr__df_unit__df_irred__df_invr__df_dvr__df_rprm with
wceq ccyg (crab (λ x0 . wrex (λ x1 . wceq (crn (cmpt (λ x2 . cz) (λ x2 . co (cv x2) (cv x1) (cfv (cv x0) cmg)))) (cfv (cv x0) cbs)) (λ x1 . cfv (cv x0) cbs)) (λ x0 . cgrp)).