-lemma cpcs_inv_lift: ∀G,L,K,c,l,k. ⬇[c, l, k] L ≡ K →
- â\88\80T1,U1. â¬\86[l, k] T1 â\89¡ U1 â\86\92 â\88\80T2,U2. â¬\86[l, k] T2 â\89¡ U2 →
+lemma cpcs_inv_lift: ∀G,L,K,b,l,k. ⬇[b, l, k] L ≘ K →
+ â\88\80T1,U1. â¬\86[l, k] T1 â\89\98 U1 â\86\92 â\88\80T2,U2. â¬\86[l, k] T2 â\89\98 U2 →