Apply df_coels__df_rels__df_ssr__df_refs__df_refrels__df_refrel__df_cnvrefs__df_cnvrefrels__df_cnvrefrel__df_syms__df_symrels__df_symrel__df_prt__ax_c5__ax_c4__ax_c7__ax_c10__ax_c10_b with
wceq csyms (cab (λ x0 . wbr (ccnv (cin (cv x0) (cxp (cdm (cv x0)) (crn (cv x0))))) (cin (cv x0) (cxp (cdm (cv x0)) (crn (cv x0)))) cssr)).
Assume H13: ∀ x0 : ι → ο . ∀ x1 . (∀ x2 . x0 x2) ⟶ x0 x1.