(* Basic_1: was just: sn3_lift *)
(* Basic_2A1: was just: csx_lift *)
-lemma csx_lifts: ∀h,G. d_liftable1 … (csx h G).
+lemma csx_lifts (h) (G):
+ d_liftable1 … (csx h G).
#h #G #K #T #H @(csx_ind … H) -T
#T1 #_ #IH #b #f #L #HLK #U1 #HTU1
@csx_intro #U2 #HU12 #HnU12
(* Basic_1: was just: sn3_gen_lift *)
(* Basic_2A1: was just: csx_inv_lift *)
-lemma csx_inv_lifts: ∀h,G. d_deliftable1 … (csx h G).
+lemma csx_inv_lifts (h) (G):
+ d_deliftable1 … (csx h G).
#h #G #L #U #H @(csx_ind … H) -U
#U1 #_ #IH #b #f #K #HLK #T1 #HTU1
@csx_intro #T2 #HT12 #HnT12