(* Properties with generic slicing for local environments *******************)
-lemma fqup_drops_succ: â\88\80b,G,K,T,i,L,U. â¬\87*[â\86\91i] L â\89\98 K â\86\92 â¬\86*[↑i] T ≘ U →
- ⦃G, L, U⦄ ⊐+[b] ⦃G, K, T⦄.
+lemma fqup_drops_succ: â\88\80b,G,K,T,i,L,U. â\87©*[â\86\91i] L â\89\98 K â\86\92 â\87§*[↑i] T ≘ U →
+ ⦃G,L,U⦄ ⬂+[b] ⦃G,K,T⦄.
#b #G #K #T #i elim i -i
[ #L #U #HLK #HTU elim (drops_inv_succ … HLK) -HLK
#I #Y #HY #H destruct <(drops_fwd_isid … HY) -K //
]
qed.
-lemma fqup_drops_strap1: â\88\80b,G1,G2,L1,K1,K2,T1,T2,U1,i. â¬\87*[i] L1 â\89\98 K1 â\86\92 â¬\86*[i] T1 ≘ U1 →
- ⦃G1, K1, T1⦄ ⊐[b] ⦃G2, K2, T2⦄ → ⦃G1, L1, U1⦄ ⊐+[b] ⦃G2, K2, T2⦄.
+lemma fqup_drops_strap1: â\88\80b,G1,G2,L1,K1,K2,T1,T2,U1,i. â\87©*[i] L1 â\89\98 K1 â\86\92 â\87§*[i] T1 ≘ U1 →
+ ⦃G1,K1,T1⦄ ⬂[b] ⦃G2,K2,T2⦄ → ⦃G1,L1,U1⦄ ⬂+[b] ⦃G2,K2,T2⦄.
#b #G1 #G2 #L1 #K1 #K2 #T1 #T2 #U1 *
[ #HLK1 #HTU1 #HT12
>(drops_fwd_isid … HLK1) -L1 //
]
qed-.
-lemma fqup_lref: â\88\80b,I,G,L,K,V,i. â¬\87*[i] L â\89\98 K.â\93\91{I}V â\86\92 â¦\83G, L, #iâ¦\84 â\8a\90+[b] â¦\83G, K, V⦄.
+lemma fqup_lref: â\88\80b,I,G,L,K,V,i. â\87©*[i] L â\89\98 K.â\93\91{I}V â\86\92 â¦\83G,L,#iâ¦\84 â¬\82+[b] â¦\83G,K,V⦄.
/2 width=6 by fqup_drops_strap1/ qed.