t1 ➡𝐝𝐟[p,q] t2 → ↑[f]t1 ➡𝐟[⊗p,⊗q] ↑[f]t2.
#f #p #q #t1 #t2 #H0t1
* #b #n * #Hb #Hn #Ht1 #Ht2
-@(ex1_2_intro … (⊗b) (❘⊗q❘)) @and4_intro
+@(ex1_2_intro â\80¦ (â\8a\97b) (â\86\91â\9d\98â\8a\97qâ\9d\98)) @and4_intro
[ //
| #g <lift_rmap_structure <depth_structure
>tr_pushs_swap <tr_pap_pushs_le //
| lapply (in_comp_lift_bi f … Ht1) -Ht1 -H0t1 -Hb -Ht2
<lift_d_empty_dx //
-| lapply (eq_lift_bi f … Ht2) -Ht2 #Ht2
+| lapply (lift_term_eq_repl_dx f … Ht2) -Ht2 #Ht2
@(subset_eq_trans … Ht2) -t2
@(subset_eq_trans … (lift_fsubst …))
[ <structure_append <structure_A_sn <structure_append <structure_L_sn