Combine the different prov cases into one function
This commit is contained in:
Yiyun Liu
parent
8fc90f5935
commit
6eba80ed70
2 changed files with 135 additions and 183 deletions
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@ -1,7 +1,7 @@
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From Ltac2 Require Ltac2.
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Import Ltac2.Notations.
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Import Ltac2.Control.
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Require Import ssreflect.
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Require Import ssreflect ssrbool.
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Require Import FunInd.
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Require Import Arith.Wf_nat.
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Require Import Psatz.
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@ -1049,26 +1049,28 @@ Qed.
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Local Ltac prov_tac := sfirstorder use:depth_ren.
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Local Ltac extract_tac := rewrite -?depth_subst_bool;hauto use:depth_subst_bool.
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(* Can consider combine prov and provU *)
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#[tactic="prov_tac"]Equations prov {n} (A : Tm n) (B : Tm (S n)) (a : Tm n) : Prop by wf (depth_tm a) lt :=
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prov A B (TBind _ A0 B0) := rtc Par.R A A0 /\ rtc Par.R B B0;
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prov A B (Abs a) := prov (ren_Tm shift A) (ren_Tm (upRen_Tm_Tm shift) B) a;
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prov A B (App a b) := prov A B a;
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prov A B (Pair a b) := prov A B a /\ prov A B b;
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prov A B (Proj p a) := prov A B a;
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prov A B Bot := False;
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prov A B (VarTm _) := False;
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prov A B (Univ _) := False .
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Definition prov_bind {n} p0 A0 B0 (a : Tm n) :=
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match a with
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| TBind p A B => p = p0 /\ rtc Par.R A A0 /\ rtc Par.R B B0
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| _ => False
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end.
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#[tactic="prov_tac"]Equations provU {n} (i : nat) (a : Tm n) : Prop by wf (depth_tm a) lt :=
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provU i (TBind _ A0 B0) := False;
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provU i (Abs a) := provU i a;
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provU i (App a b) := provU i a;
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provU i (Pair a b) := provU i a /\ provU i b;
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provU i (Proj p a) := provU i a;
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provU i Bot := False;
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provU i (VarTm _) := False;
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provU i (Univ j) := i = j.
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Definition prov_univ {n} i0 (a : Tm n) :=
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match a with
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| Univ i => i = i0
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| _ => False
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end.
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(* Can consider combine prov and provU *)
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#[tactic="prov_tac"]Equations prov {n} (h : Tm n) (a : Tm n) : Prop by wf (depth_tm a) lt :=
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prov h (TBind p0 A0 B0) := prov_bind p0 A0 B0 h;
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prov h (Abs a) := prov (ren_Tm shift h) a;
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prov h (App a b) := prov h a;
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prov h (Pair a b) := prov h a /\ prov h b;
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prov h (Proj p a) := prov h a;
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prov h Bot := False;
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prov h (VarTm _) := False;
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prov h (Univ i) := prov_univ i h .
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#[tactic="prov_tac"]Equations extract {n} (a : Tm n) : Tm n by wf (depth_tm a) lt :=
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extract (TBind p A B) := TBind p A B;
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@ -1080,7 +1082,6 @@ Local Ltac extract_tac := rewrite -?depth_subst_bool;hauto use:depth_subst_bool.
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extract (VarTm i) := (VarTm i);
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extract (Univ i) := Univ i.
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Lemma ren_extract n m (a : Tm n) (ξ : fin n -> fin m) :
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extract (ren_Tm ξ a) = ren_Tm ξ (extract a).
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Proof.
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@ -1112,91 +1113,80 @@ Lemma tm_depth_ind (P : forall n, Tm n -> Prop) :
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lia.
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Qed.
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Lemma prov_ren n m (ξ : fin n -> fin m) A B a :
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prov A B a -> prov (ren_Tm ξ A) (ren_Tm (upRen_Tm_Tm ξ) B) (ren_Tm ξ a).
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Lemma prov_bind_ren n m p (A : Tm n) B (ξ : fin n -> fin m) a :
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prov_bind p A B a ->
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prov_bind p (ren_Tm ξ A) (ren_Tm (upRen_Tm_Tm ξ) B) (ren_Tm ξ a).
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Proof.
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move : m ξ A B. elim : n / a.
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case : a => //=.
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hauto l:on use:Pars.renaming.
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Qed.
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Lemma prov_ren n m (ξ : fin n -> fin m) h a :
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prov h a -> prov (ren_Tm ξ h) (ren_Tm ξ a).
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Proof.
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move : m ξ h. elim : n / a.
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- sfirstorder rew:db:prov.
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- move => n a ih m ξ A B.
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simp prov. simpl.
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- move => n a ih m ξ h.
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simp prov.
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move /ih => {ih}.
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move /(_ _ (upRen_Tm_Tm ξ)).
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simp prov. by asimpl.
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move /(_ _ (upRen_Tm_Tm ξ)) => /=.
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simp prov.
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move => h0.
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suff : ren_Tm (upRen_Tm_Tm ξ) (ren_Tm shift h) = ren_Tm shift (ren_Tm ξ h) by move => <-.
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clear.
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case : h => * /=; by asimpl.
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- hauto q:on rew:db:prov.
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- qauto l:on rew:db:prov.
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- hauto lq:on rew:db:prov.
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- move => n p A0 ih B0 h0 m ξ A B. simpl.
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simp prov.
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hauto l:on use:Pars.renaming.
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- sfirstorder.
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- hauto l:on use:prov_bind_ren rew:db:prov.
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- sfirstorder.
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- hauto l:on inv:Tm rew:db:prov.
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Qed.
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Lemma provU_ren n m (ξ : fin n -> fin m) i a :
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provU i a -> provU i (ren_Tm ξ a).
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Proof.
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move : m ξ i. elim : n / a.
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- sfirstorder rew:db:prov.
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- move => n a ih m ξ i.
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simp provU =>/=.
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move /ih => {ih}.
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move /(_ _ (upRen_Tm_Tm ξ)).
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simp provU.
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- hauto q:on rew:db:provU.
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- qauto l:on rew:db:provU.
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- hauto lq:on rew:db:provU.
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- move => n A0 ih B0 h0 m ξ i /=.
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simp prov.
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- sfirstorder.
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- sfirstorder.
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Qed.
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Definition hfb {n} (a : Tm n) :=
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match a with
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| TBind _ _ _ => true
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| Univ _ => true
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| _ => false
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end.
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Lemma prov_morph n m (ρ : fin n -> Tm m) A B a :
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prov A B a ->
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prov (subst_Tm ρ A) (subst_Tm (up_Tm_Tm ρ) B) (subst_Tm ρ a).
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Lemma prov_morph n m (ρ : fin n -> Tm m) h a :
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prov h a ->
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hfb h ->
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prov (subst_Tm ρ h) (subst_Tm ρ a).
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Proof.
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move : m ρ A B. elim : n / a.
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move : m ρ h. elim : n / a.
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- hauto q:on rew:db:prov.
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- move => n a ih m ρ A B.
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- move => n a ih m ρ h + hb.
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simp prov => /=.
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move /ih => {ih}.
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move /(_ _ (up_Tm_Tm ρ)). asimpl.
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move /(_ _ (up_Tm_Tm ρ) ltac:(hauto lq:on inv:Tm)).
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simp prov. by asimpl.
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- hauto q:on rew:db:prov.
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- hauto q:on rew:db:prov.
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- hauto lq:on rew:db:prov.
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- hauto l:on use:Pars.substing rew:db:prov.
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- qauto rew:db:prov.
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- move => n p A ihA B ihB m ρ h /=. simp prov => //= + h0.
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case : h h0 => //=.
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move => p0 A0 B0 _ [? [h1 h2]]. subst.
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hauto l:on use:Pars.substing rew:db:prov.
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- qauto rew:db:prov.
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- hauto l:on inv:Tm rew:db:prov.
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Qed.
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Lemma provU_morph n m (ρ : fin n -> Tm m) i a :
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provU i a ->
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provU i (subst_Tm ρ a).
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Proof.
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move : m ρ i. elim : n / a.
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- hauto q:on rew:db:provU.
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- move => n a ih m ρ i.
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simp provU => /=.
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move /ih => {ih}.
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move /(_ _ (up_Tm_Tm ρ)). asimpl.
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simp provU.
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- hauto q:on rew:db:provU.
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- hauto q:on rew:db:provU.
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- hauto lq:on rew:db:provU.
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- hauto l:on use:Pars.substing rew:db:provU.
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- qauto rew:db:provU.
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- qauto rew:db:provU.
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Qed.
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Lemma ren_hfb {n m} (ξ : fin n -> fin m) u : hfb (ren_Tm ξ u) = hfb u.
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Proof. move : m ξ. elim : n /u =>//=. Qed.
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Lemma prov_par n (A : Tm n) B a b : prov A B a -> Par.R a b -> prov A B b.
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Hint Rewrite @ren_hfb : prov.
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Lemma prov_par n (u : Tm n) a b : prov u a -> hfb u -> Par.R a b -> prov u b.
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Proof.
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move => + h. move : A B.
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move => + + h. move : u.
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elim : n a b /h.
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- move => n a0 a1 b0 b1 ha iha hb ihb A B /=.
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simp prov => h.
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move /iha : h.
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move /(prov_morph _ _ (scons b1 VarTm)).
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- move => n a0 a1 b0 b1 ha iha hb ihb u /=.
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simp prov => h h0.
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have h1 : hfb (ren_Tm shift u) by eauto using ren_hfb.
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move /iha /(_ h1) : h.
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move /(prov_morph _ _ (scons b1 VarTm)) /(_ h1).
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by asimpl.
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- hauto lq:on rew:db:prov.
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- hauto lq:on rew:db:prov.
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@ -1205,63 +1195,40 @@ Proof.
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hauto l:on use:prov_ren.
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- hauto l:on rew:db:prov.
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- simp prov.
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- move => n a0 a1 ha iha A B. simp prov.
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- hauto lq:on rew:db:prov.
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- hauto l:on rew:db:prov.
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- hauto l:on rew:db:prov.
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- hauto lq:on rew:db:prov.
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- move => n p A0 A1 B0 B1 hA ihA hB ihB A B. simp prov.
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move => [hA0 hA1].
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eauto using rtc_r.
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- move => n p A0 A1 B0 B1 hA ihA hB ihB u. simp prov.
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case : u => //=.
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move => p0 A B [? [h2 h3]]. subst.
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move => ?. repeat split => //=;
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hauto l:on use:rtc_r rew:db:prov.
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- sfirstorder.
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- sfirstorder.
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Qed.
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Lemma provU_par n i (a b : Tm n) : provU i a -> Par.R a b -> provU i b.
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Lemma prov_pars n (u : Tm n) a b : hfb u -> prov u a -> rtc Par.R a b -> prov u b.
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Proof.
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move => + h. move : i.
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elim : n a b /h.
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- move => n a0 a1 b0 b1 ha iha hb ihb i /=.
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simp provU => h.
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move /iha : h.
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move /(provU_morph _ _ (scons b1 VarTm)).
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by asimpl.
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- hauto lq:on rew:db:provU.
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- hauto lq:on rew:db:provU.
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- hauto lq:on rew:db:provU.
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- move => n a0 a1 ha iha i. simp provU. move /iha.
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hauto l:on use:provU_ren.
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- hauto l:on rew:db:provU.
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- simp provU.
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- move => n a0 a1 ha iha i. simp provU.
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- hauto l:on rew:db:provU.
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- hauto l:on rew:db:provU.
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- hauto lq:on rew:db:provU.
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- move => n p A0 A1 B0 B1 hA ihA hB ihB i. simp provU.
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- sfirstorder.
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- sfirstorder.
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induction 3; hauto lq:on ctrs:rtc use:prov_par.
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Qed.
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Lemma prov_pars n (A : Tm n) B a b : prov A B a -> rtc Par.R a b -> prov A B b.
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Proof.
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induction 2; hauto lq:on use:prov_par.
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Qed.
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Definition prov_extract_spec {n} u (a : Tm n) :=
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match u with
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| TBind p A B => exists A0 B0, extract a = TBind p A0 B0 /\ rtc Par.R A A0 /\ rtc Par.R B B0
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| Univ i => extract a = Univ i
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| _ => True
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end.
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Lemma provU_pars n i (a : Tm n) b : provU i a -> rtc Par.R a b -> provU i b.
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Lemma prov_extract n u (a : Tm n) :
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prov u a -> prov_extract_spec u a.
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Proof.
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induction 2; hauto lq:on use:provU_par.
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Qed.
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Lemma prov_extract n p A B (a : Tm n) :
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prov A B a -> exists A0 B0,
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extract a = TBind p A0 B0 /\ rtc Par.R A A0 /\ rtc Par.R B B0.
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Proof.
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move : A B. elim : n / a => //=.
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- move => n a ih A B.
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simp prov.
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move /ih.
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simp extract.
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move => [A0][B0][h0][h1]h2.
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(* anti renaming for par *)
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move : u. elim : n / a => //=.
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- move => n a ih [] //=.
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+ move => p A B /=.
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simp prov. move /ih {ih}.
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simpl.
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move => [A0[B0[h [h0 h1]]]].
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have : exists A1, rtc Par.R A A1 /\ ren_Tm shift A1 = A0
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by hauto l:on use:Pars.antirenaming.
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move => [A1 [h3 h4]].
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@ -1271,32 +1238,15 @@ Proof.
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subst.
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have {}h0 : subst_Tm (scons Bot VarTm) (extract a) =
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subst_Tm (scons Bot VarTm) (ren_Tm shift (TBind p A1 B1)) by sauto lq:on.
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move : h0. asimpl. move => ->.
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hauto lq:on.
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- hauto l:on rew:db:prov, extract.
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- hauto l:on rew:db:prov, extract.
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- hauto l:on rew:db:prov, extract.
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- best rew:db:prov, extract.
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Qed.
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Lemma provU_extract n i (a : Tm n) :
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provU i a -> extract a = Univ i.
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Proof.
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move : i. elim : n / a => //=.
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- move => n a ih i.
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simp provU.
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move /ih.
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simp extract.
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move => h.
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(* anti renaming for par *)
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have {}h0 : subst_Tm (scons Bot VarTm) (extract a) =
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subst_Tm (scons Bot VarTm) (ren_Tm shift (Univ i)) by sauto lq:on.
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move : h0. asimpl. move => ->.
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hauto lq:on.
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- hauto l:on rew:db:provU, extract.
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- hauto l:on rew:db:provU, extract.
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- hauto l:on rew:db:provU, extract.
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- qauto l:on rew:db:provU, extract.
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move : h0. asimpl.
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hauto lq:on rew:db:extract.
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+ hauto q:on rew:db:extract, prov.
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- hauto lq:on rew:off inv:Tm rew:db:prov, extract.
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- move => + + + + + []//=;
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hauto lq:on rew:off rew:db:prov, extract.
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- hauto inv:Tm l:on rew:db:prov, extract.
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- hauto l:on inv:Tm rew:db:prov, extract.
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- hauto l:on inv:Tm rew:db:prov, extract.
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Qed.
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Lemma EPar_Par n (a b : Tm n) : EPar.R a b -> Par.R a b.
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@ -1375,10 +1325,10 @@ Module ERPar.
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- sfirstorder use:EPar.AppCong, @rtc_once.
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Qed.
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Lemma BindCong n (a0 a1 : Tm n) b0 b1:
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Lemma BindCong n p (a0 a1 : Tm n) b0 b1:
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R a0 a1 ->
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R b0 b1 ->
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rtc R (Pi a0 b0) (Pi a1 b1).
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rtc R (TBind p a0 b0) (TBind p a1 b1).
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Proof.
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move => [] + [].
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- sfirstorder use:RPar.BindCong, @rtc_once.
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@ -1454,10 +1404,10 @@ Module ERPars.
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rtc ERPar.R (Proj p a0) (Proj p a1).
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Proof. solve_s. Qed.
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Lemma BindCong n (a0 a1 : Tm n) b0 b1:
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Lemma BindCong n p (a0 a1 : Tm n) b0 b1:
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rtc ERPar.R a0 a1 ->
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rtc ERPar.R b0 b1 ->
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rtc ERPar.R (Pi a0 b0) (Pi a1 b1).
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rtc ERPar.R (TBind p a0 b0) (TBind p a1 b1).
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Proof. solve_s. Qed.
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Lemma renaming n (a0 a1 : Tm n) m (ξ : fin n -> fin m) :
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@ -1690,18 +1640,20 @@ Lemma pars_univ_inv n i (c : Tm n) :
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rtc Par.R (Univ i) c ->
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extract c = Univ i.
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Proof.
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have : provU i (Univ i : Tm n) by sfirstorder.
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move : provU_pars. repeat move/[apply].
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by move/provU_extract.
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have : prov (Univ i) (Univ i : Tm n) by sfirstorder.
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move : prov_pars. repeat move/[apply].
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move /(_ ltac:(reflexivity)).
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by move/prov_extract.
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Qed.
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Lemma pars_pi_inv n (A : Tm n) B C :
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rtc Par.R (Pi A B) C ->
|
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exists A0 B0, extract C = Pi A0 B0 /\
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Lemma pars_pi_inv n p (A : Tm n) B C :
|
||||
rtc Par.R (TBind p A B) C ->
|
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exists A0 B0, extract C = TBind p A0 B0 /\
|
||||
rtc Par.R A A0 /\ rtc Par.R B B0.
|
||||
Proof.
|
||||
have : prov A B (Pi A B) by sfirstorder.
|
||||
have : prov (TBind p A B) (TBind p A B) by sfirstorder.
|
||||
move : prov_pars. repeat move/[apply].
|
||||
move /(_ eq_refl).
|
||||
by move /prov_extract.
|
||||
Qed.
|
||||
|
||||
|
|
@ -1713,10 +1665,10 @@ Proof.
|
|||
sauto l:on use:pars_univ_inv.
|
||||
Qed.
|
||||
|
||||
Lemma pars_pi_inj n (A0 A1 : Tm n) B0 B1 C :
|
||||
rtc Par.R (Pi A0 B0) C ->
|
||||
rtc Par.R (Pi A1 B1) C ->
|
||||
exists A2 B2, rtc Par.R A0 A2 /\ rtc Par.R A1 A2 /\
|
||||
Lemma pars_pi_inj n p0 p1 (A0 A1 : Tm n) B0 B1 C :
|
||||
rtc Par.R (TBind p0 A0 B0) C ->
|
||||
rtc Par.R (TBind p1 A1 B1) C ->
|
||||
exists A2 B2, p1 = p0 /\ rtc Par.R A0 A2 /\ rtc Par.R A1 A2 /\
|
||||
rtc Par.R B0 B2 /\ rtc Par.R B1 B2.
|
||||
Proof.
|
||||
move /pars_pi_inv => [A2 [B2 [? [h0 h1]]]].
|
||||
|
|
@ -1730,17 +1682,17 @@ Proof.
|
|||
sfirstorder use:pars_univ_inj.
|
||||
Qed.
|
||||
|
||||
Lemma join_pi_inj n (A0 A1 : Tm n) B0 B1 :
|
||||
join (Pi A0 B0) (Pi A1 B1) ->
|
||||
join A0 A1 /\ join B0 B1.
|
||||
Lemma join_pi_inj n p0 p1 (A0 A1 : Tm n) B0 B1 :
|
||||
join (TBind p0 A0 B0) (TBind p1 A1 B1) ->
|
||||
p0 = p1 /\ join A0 A1 /\ join B0 B1.
|
||||
Proof.
|
||||
move => [c []].
|
||||
move : pars_pi_inj; repeat move/[apply].
|
||||
sfirstorder unfold:join.
|
||||
Qed.
|
||||
|
||||
Lemma join_univ_pi_contra n (A : Tm n) B i :
|
||||
join (Pi A B) (Univ i) -> False.
|
||||
Lemma join_univ_pi_contra n p (A : Tm n) B i :
|
||||
join (TBind p A B) (Univ i) -> False.
|
||||
Proof.
|
||||
rewrite /join.
|
||||
move => [c [h0 h1]].
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue