Step
*
1
1
2
1
1
1
of Lemma
hered-term-accum_wf
.....subterm..... T:t
2:n
1. opr : Type
2. P : term(opr) ⟶ ℙ
3. Param : Type
4. C : Param ⟶ (varname() List × hered-term(opr;t.P[t])) ⟶ Type
5. nextp : Param ⟶ (varname() List) ⟶ opr ⟶ very-dep-fun(Param;varname() List × hered-term(opr;t.P[t]);a,bt.C[a;bt])
6. m : a:Param
⟶ vs:(varname() List)
⟶ f:opr
⟶ L:{L:(a:Param × bt:varname() List × hered-term(opr;t.P[t]) × C[a;bt]) List|
vdf-eq(Param;nextp a vs f;L) ∧ hereditarily(opr;s.P[s];mkterm(f;map(λx.(fst(snd(x)));L)))}
⟶ C[a;<vs, mkterm(f;map(λx.(fst(snd(x)));L))>]
7. varcase : a:Param
⟶ vs:(varname() List)
⟶ v:{v:varname()| (¬(v = nullvar() ∈ varname())) ∧ P[varterm(v)]}
⟶ C[a;<vs, varterm(v)>]
8. n : ℕ
9. ∀n:ℕn. ∀p:Param. ∀bt:varname() List × hered-term(opr;t.P[t]).
((term-size(snd(bt)) ≤ n)
⇒ (hered-term-accum(p,vs,v.varcase[p;vs;v];
prm,vs,f,L.m[prm;vs;f;L];
p0,ws,op,sofar,bt.nextp[p0;ws;op;sofar;bt];
p;
bt) ∈ C[p;bt]))
10. p : Param
11. b1 : varname() List
12. y1 : opr
13. y2 : (varname() List × term(opr)) List
14. hereditarily(opr;s.P[s];inr <y1, y2> )
15. term-size(inr <y1, y2> ) ≤ n
16. λsofar,bt. nextp[p;b1;y1;sofar;bt] ∈ very-dep-fun(Param;varname() List × hered-term(opr;t.P[t]);a,bt.C[a;bt])
17. y2 ∈ (varname() List × hered-term(opr;t.P[t])) List
18. bound-terms-accum(L,bt.nextp p b1 y1 L bt;a,bt.hered-term-accum(p,vs,v.varcase p vs v;
prm,vs,f,L.m prm vs f L;
p0,ws,op,sofar,bt.nextp p0 ws op sofar bt;
a;
bt);y2) ∈ {L:(a:Param
× b:varname() List × hered-term(opr;t.P
t)
× (C a b)) List|
vdf-eq(Param;λ2sofar bt.nextp p b1 y1
sofar
bt;L)
∧ (map(λx.(fst(snd(x)));L)
= y2
∈ ((varname() List
× hered-term(opr;t.P t)) List))}
19. L : (a:Param × b:varname() List × hered-term(opr;t.P t) × (C a b)) List
20. vdf-eq(Param;λ2sofar bt.nextp p b1 y1 sofar bt;L)
21. map(λx.(fst(snd(x)));L) = y2 ∈ ((varname() List × hered-term(opr;t.P t)) List)
⊢ mkterm(y1;map(λx.(fst(snd(x)));L)) = (inr <y1, y2> ) ∈ hered-term(opr;t.P[t])
BY
{ (Fold `mkterm` 0 THEN Symmetry) }
1
1. opr : Type
2. P : term(opr) ⟶ ℙ
3. Param : Type
4. C : Param ⟶ (varname() List × hered-term(opr;t.P[t])) ⟶ Type
5. nextp : Param ⟶ (varname() List) ⟶ opr ⟶ very-dep-fun(Param;varname() List × hered-term(opr;t.P[t]);a,bt.C[a;bt])
6. m : a:Param
⟶ vs:(varname() List)
⟶ f:opr
⟶ L:{L:(a:Param × bt:varname() List × hered-term(opr;t.P[t]) × C[a;bt]) List|
vdf-eq(Param;nextp a vs f;L) ∧ hereditarily(opr;s.P[s];mkterm(f;map(λx.(fst(snd(x)));L)))}
⟶ C[a;<vs, mkterm(f;map(λx.(fst(snd(x)));L))>]
7. varcase : a:Param
⟶ vs:(varname() List)
⟶ v:{v:varname()| (¬(v = nullvar() ∈ varname())) ∧ P[varterm(v)]}
⟶ C[a;<vs, varterm(v)>]
8. n : ℕ
9. ∀n:ℕn. ∀p:Param. ∀bt:varname() List × hered-term(opr;t.P[t]).
((term-size(snd(bt)) ≤ n)
⇒ (hered-term-accum(p,vs,v.varcase[p;vs;v];
prm,vs,f,L.m[prm;vs;f;L];
p0,ws,op,sofar,bt.nextp[p0;ws;op;sofar;bt];
p;
bt) ∈ C[p;bt]))
10. p : Param
11. b1 : varname() List
12. y1 : opr
13. y2 : (varname() List × term(opr)) List
14. hereditarily(opr;s.P[s];inr <y1, y2> )
15. term-size(inr <y1, y2> ) ≤ n
16. λsofar,bt. nextp[p;b1;y1;sofar;bt] ∈ very-dep-fun(Param;varname() List × hered-term(opr;t.P[t]);a,bt.C[a;bt])
17. y2 ∈ (varname() List × hered-term(opr;t.P[t])) List
18. bound-terms-accum(L,bt.nextp p b1 y1 L bt;a,bt.hered-term-accum(p,vs,v.varcase p vs v;
prm,vs,f,L.m prm vs f L;
p0,ws,op,sofar,bt.nextp p0 ws op sofar bt;
a;
bt);y2) ∈ {L:(a:Param
× b:varname() List × hered-term(opr;t.P
t)
× (C a b)) List|
vdf-eq(Param;λ2sofar bt.nextp p b1 y1
sofar
bt;L)
∧ (map(λx.(fst(snd(x)));L)
= y2
∈ ((varname() List
× hered-term(opr;t.P t)) List))}
19. L : (a:Param × b:varname() List × hered-term(opr;t.P t) × (C a b)) List
20. vdf-eq(Param;λ2sofar bt.nextp p b1 y1 sofar bt;L)
21. map(λx.(fst(snd(x)));L) = y2 ∈ ((varname() List × hered-term(opr;t.P t)) List)
⊢ mkterm(y1;y2) = mkterm(y1;map(λx.(fst(snd(x)));L)) ∈ hered-term(opr;t.P[t])
Latex:
Latex:
.....subterm..... T:t
2:n
1. opr : Type
2. P : term(opr) {}\mrightarrow{} \mBbbP{}
3. Param : Type
4. C : Param {}\mrightarrow{} (varname() List \mtimes{} hered-term(opr;t.P[t])) {}\mrightarrow{} Type
5. nextp : Param
{}\mrightarrow{} (varname() List)
{}\mrightarrow{} opr
{}\mrightarrow{} very-dep-fun(Param;varname() List \mtimes{} hered-term(opr;t.P[t]);a,bt.C[a;bt])
6. m : a:Param
{}\mrightarrow{} vs:(varname() List)
{}\mrightarrow{} f:opr
{}\mrightarrow{} L:\{L:(a:Param \mtimes{} bt:varname() List \mtimes{} hered-term(opr;t.P[t]) \mtimes{} C[a;bt]) List|
vdf-eq(Param;nextp a vs f;L) \mwedge{} hereditarily(opr;s.P[s];mkterm(f;map(\mlambda{}x.(fst(snd(x)));L)))\}
{}\mrightarrow{} C[a;<vs, mkterm(f;map(\mlambda{}x.(fst(snd(x)));L))>]
7. varcase : a:Param
{}\mrightarrow{} vs:(varname() List)
{}\mrightarrow{} v:\{v:varname()| (\mneg{}(v = nullvar())) \mwedge{} P[varterm(v)]\}
{}\mrightarrow{} C[a;<vs, varterm(v)>]
8. n : \mBbbN{}
9. \mforall{}n:\mBbbN{}n. \mforall{}p:Param. \mforall{}bt:varname() List \mtimes{} hered-term(opr;t.P[t]).
((term-size(snd(bt)) \mleq{} n)
{}\mRightarrow{} (hered-term-accum(p,vs,v.varcase[p;vs;v];
prm,vs,f,L.m[prm;vs;f;L];
p0,ws,op,sofar,bt.nextp[p0;ws;op;sofar;bt];
p;
bt) \mmember{} C[p;bt]))
10. p : Param
11. b1 : varname() List
12. y1 : opr
13. y2 : (varname() List \mtimes{} term(opr)) List
14. hereditarily(opr;s.P[s];inr <y1, y2> )
15. term-size(inr <y1, y2> ) \mleq{} n
16. \mlambda{}sofar,bt. nextp[p;b1;y1;sofar;bt] \mmember{} very-dep-fun(Param;varname() List
\mtimes{} hered-term(opr;t.P[t]);a,bt.C[a;bt])
17. y2 \mmember{} (varname() List \mtimes{} hered-term(opr;t.P[t])) List
18. bound-terms-accum(L,bt.nextp p b1 y1 L bt;a,bt.hered-term-accum
(p,vs,v.varcase p vs v;
prm,vs,f,L.m prm vs f L;
p0,ws,op,sofar,bt.nextp p0 ws op sofar bt;
a;
bt);y2) \mmember{} \{L:(a:Param
\mtimes{} b:varname() List
\mtimes{} hered-term(opr;t.P t)
\mtimes{} (C a b)) List|
vdf-eq(Param;\mlambda{}\msubtwo{}sofar bt.nextp p b1
y1
sofar
bt;L)
\mwedge{} (map(\mlambda{}x.(fst(snd(x)));L) = y2)\}
19. L : (a:Param \mtimes{} b:varname() List \mtimes{} hered-term(opr;t.P t) \mtimes{} (C a b)) List
20. vdf-eq(Param;\mlambda{}\msubtwo{}sofar bt.nextp p b1 y1 sofar bt;L)
21. map(\mlambda{}x.(fst(snd(x)));L) = y2
\mvdash{} mkterm(y1;map(\mlambda{}x.(fst(snd(x)));L)) = (inr <y1, y2> )
By
Latex:
(Fold `mkterm` 0 THEN Symmetry)
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