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4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
8 (* ||A|| http://helm.cs.unibo.it *)
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15 include "Basic_2/substitution/ldrop.ma".
17 (* ABSTRACT COMPUTATION PROPERTIES ******************************************)
19 definition CP1 ≝ λRR:lenv→relation term. λRS:relation term.
20 ∀L,k. NF … (RR L) RS (⋆k).
22 definition CP2 ≝ λRR:lenv→relation term. λRS:relation term.
23 ∀L,K,W,i. ⇓[0,i] L ≡ K. 𝕓{Abst} W → NF … (RR L) RS (#i).
25 definition CP3 ≝ λRR:lenv→relation term. λRP:lenv→predicate term.
26 ∀L,V,k. RP L (𝕔{Appl}⋆k.V) → RP L V.
28 (* requirements for abstract computation properties *)
29 record acp (RR:lenv->relation term) (RS:relation term) (RP:lenv→predicate term) : Prop ≝