(* Basic_1: was: cpcs_dec *)
lemma csx_cpcs_dec (h) (G) (L):
- â\88\80T1. â¦\83G,Lâ¦\84 â\8a¢ â¬\88*[h] ð\9d\90\92â¦\83T1â¦\84 â\86\92 â\88\80T2. â¦\83G,Lâ¦\84 â\8a¢ â¬\88*[h] ð\9d\90\92â¦\83T2â¦\84 →
- Decidable â\80¦ (â¦\83G,Lâ¦\84 ⊢ T1 ⬌*[h] T2).
+ â\88\80T1. â\9dªG,Lâ\9d« â\8a¢ â¬\88*[h] ð\9d\90\92â\9dªT1â\9d« â\86\92 â\88\80T2. â\9dªG,Lâ\9d« â\8a¢ â¬\88*[h] ð\9d\90\92â\9dªT2â\9d« →
+ Decidable â\80¦ (â\9dªG,Lâ\9d« ⊢ T1 ⬌*[h] T2).
#h #G #L #T1 #HT1 #T2 #HT2
elim (cprre_total_csx … HT1) -HT1 #U1 #HTU1
elim (cprre_total_csx … HT2) -HT2 #U2 #HTU2