(* Properties with generic slicing for local environments *******************)
-lemma fqus_drops: â\88\80b,G,L,K,T,U,i. â¬\87*[i] L â\89\98 K â\86\92 â¬\86*[i] T ≘ U →
- â¦\83G,L,Uâ¦\84 â¬\82*[b] â¦\83G,K,Tâ¦\84.
+lemma fqus_drops: â\88\80b,G,L,K,T,U,i. â\87©[i] L â\89\98 K â\86\92 â\87§[i] T ≘ U →
+ â\9d¨G,L,Uâ\9d© â¬\82*[b] â\9d¨G,K,Tâ\9d©.
#b #G #L #K #T #U * /3 width=3 by fqup_drops_succ, fqup_fqus/
#HLK #HTU <(lifts_fwd_isid … HTU) -U // <(drops_fwd_isid … HLK) -K //
qed.