theorem csx_acp: ∀h,g. acp (cpx h g) (eq …) (csx h g).
#h #g @mk_acp
-[ #G #L elim (deg_total h g 0) /3 width=8 by cnx_sort_iter, ex_intro/
-| /3 width=13 by cnx_lift/
+[ /3 width=13 by cnx_lift/
+| #G #L elim (deg_total h g 0) /3 width=8 by cnx_sort_iter, ex_intro/
| /2 width=3 by csx_fwd_flat_dx/
| /2 width=1 by csx_cast/
]