include "delayed_updating/syntax/path_structure.ma".
include "delayed_updating/syntax/path_balanced.ma".
include "delayed_updating/substitution/fsubst.ma".
include "delayed_updating/syntax/path_structure.ma".
include "delayed_updating/syntax/path_balanced.ma".
include "delayed_updating/substitution/fsubst.ma".
(* DELAYED FOCALIZED REDUCTION **********************************************)
inductive dfr (p) (q) (t): predicate preterm ≝
| dfr_beta (b) (n):
(* DELAYED FOCALIZED REDUCTION **********************************************)
inductive dfr (p) (q) (t): predicate preterm ≝
| dfr_beta (b) (n):
- let r ≝ p;;(𝗔;b;;(𝗟;q,𝗱❨n❩)) in
- r ϵ t → ⊓⊗b → dfr p q t (t[⋔r←t⋔p,𝗦])
+ let r ≝ p●𝗔◗b●𝗟◗q◖𝗱❨n❩ in
+ r ϵ t → ⊓⊗b → dfr p q t (t[⋔r←t⋔(p◖𝗦)])