(* FREE VARIABLES INCLUSION FOR RESTRICTED CLOSURES *************************)
definition fsle: bi_relation lenv term ≝ λL1,T1,L2,T2.
- â\88\83â\88\83n1,n2,f1,f2. L1 â\8a¢ ð\9d\90\85*â¦\83T1â¦\84 â\89¡ f1 & L2 â\8a¢ ð\9d\90\85*â¦\83T2â¦\84 â\89¡ f2 &
+ â\88\83â\88\83n1,n2,f1,f2. L1 â\8a¢ ð\9d\90\85*â¦\83T1â¦\84 â\89\98 f1 & L2 â\8a¢ ð\9d\90\85*â¦\83T2â¦\84 â\89\98 f2 &
L1 ≋ⓧ*[n1, n2] L2 & ⫱*[n1]f1 ⊆ ⫱*[n2]f2.
interpretation "free variables inclusion (restricted closure)"