(* Forward lemmas with generic relocation ***********************************)
fact lifts_fwd_vpush_aux (M): is_model M → is_extensional M →
- â\88\80f,T1,T2. â¬\86*[f] T1 ≘ T2 → ∀m. 𝐁❴m,1❵ = f →
+ â\88\80f,T1,T2. â\87§*[f] T1 ≘ T2 → ∀m. 𝐁❴m,1❵ = f →
∀gv,lv,d. ⟦T1⟧[gv,lv] ≗{M} ⟦T2⟧[gv,⫯[m←d]lv].
#M #H1M #H2M #f #T1 #T2 #H elim H -f -T1 -T2
[ #f #s #m #Hf #gv #lv #d
qed-.
lemma lifts_SO_fwd_vpush (M) (gv): is_model M → is_extensional M →
- â\88\80T1,T2. â¬\86*[1] T1 ≘ T2 →
+ â\88\80T1,T2. â\87§*[1] T1 ≘ T2 →
∀lv,d. ⟦T1⟧[gv,lv] ≗{M} ⟦T2⟧[gv,⫯[0←d]lv].
/2 width=3 by lifts_fwd_vpush_aux/ qed-.