definition dfr (p) (q): relation2 prototerm prototerm ≝
λt1,t2. ∃∃b,n.
let r ≝ p●𝗔◗b●𝗟◗q in
- â\88§â\88§ (â\8a\97b ϵ ð\9d\90\81 â\88§ ð\9d\9f\8e = â\9d\98bâ\9d\98) & â\86\91â\9d\98qâ\9d\98 = (▼[r]𝐢)@❨n❩ & r◖𝗱n ϵ t1 &
- t1[â\8b\94râ\86\90ð\9d\9b\97(n+â\9d\98bâ\9d\98).(t1⋔(p◖𝗦))] ⇔ t2
+ â\88§â\88§ (â\8a\97b ϵ ð\9d\90\81 â\88§ ð\9d\9f\8e = â\99b) & â\86\91â\99q = (▼[r]𝐢)@❨n❩ & r◖𝗱n ϵ t1 &
+ t1[â\8b\94râ\86\90ð\9d\9b\97(n+â\99b).(t1⋔(p◖𝗦))] ⇔ t2
.
interpretation