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https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaOpenFreeVarSet' | [369, 1] | [400, 17] | simp only [Formula.open] | z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
psi_ih : ∀ (j : ℕ), psi.freeVarSet ⊆ (Formula.open j (free_ z) psi).freeVarSet
j : ℕ
⊢ (phi.imp_ psi).freeVarSet ⊆ (Formula.open j (free_ z) (phi.imp_ psi)).freeVarSet | z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
psi_ih : ∀ (j : ℕ), psi.freeVarSet ⊆ (Formula.open j (free_ z) psi).freeVarSet
j : ℕ
⊢ (phi.imp_ psi).freeVarSet ⊆ ((Formula.open j (free_ z) phi).imp_ (Formula.open j (free_ z) psi)).freeVarSet |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaOpenFreeVarSet' | [369, 1] | [400, 17] | simp only [Formula.freeVarSet] | z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
psi_ih : ∀ (j : ℕ), psi.freeVarSet ⊆ (Formula.open j (free_ z) psi).freeVarSet
j : ℕ
⊢ (phi.imp_ psi).freeVarSet ⊆ ((Formula.open j (free_ z) phi).imp_ (Formula.open j (free_ z) psi)).freeVarSet | z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
psi_ih : ∀ (j : ℕ), psi.freeVarSet ⊆ (Formula.open j (free_ z) psi).freeVarSet
j : ℕ
⊢ phi.freeVarSet ∪ psi.freeVarSet ⊆
(Formula.open j (free_ z) phi).freeVarSet ∪ (Formula.open j (free_ z) psi).freeVarSet |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaOpenFreeVarSet' | [369, 1] | [400, 17] | apply Finset.union_subset_left_right | z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
psi_ih : ∀ (j : ℕ), psi.freeVarSet ⊆ (Formula.open j (free_ z) psi).freeVarSet
j : ℕ
⊢ phi.freeVarSet ∪ psi.freeVarSet ⊆
(Formula.open j (free_ z) phi).freeVarSet ∪ (Formula.open j (free_ z) psi).freeVarSet | case h1
z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
psi_ih : ∀ (j : ℕ), psi.freeVarSet ⊆ (Formula.open j (free_ z) psi).freeVarSet
j : ℕ
⊢ phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
case h2
z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
psi_ih : ∀ (j : ℕ), psi.freeVarSet ⊆ (Formula.open j (free_ z) psi).freeVarSet
j : ℕ
⊢ psi.freeVarSet ⊆ (Formula.open j (free_ z) psi).freeVarSet |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaOpenFreeVarSet' | [369, 1] | [400, 17] | exact phi_ih j | case h1
z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
psi_ih : ∀ (j : ℕ), psi.freeVarSet ⊆ (Formula.open j (free_ z) psi).freeVarSet
j : ℕ
⊢ phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaOpenFreeVarSet' | [369, 1] | [400, 17] | exact psi_ih j | case h2
z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
psi_ih : ∀ (j : ℕ), psi.freeVarSet ⊆ (Formula.open j (free_ z) psi).freeVarSet
j : ℕ
⊢ psi.freeVarSet ⊆ (Formula.open j (free_ z) psi).freeVarSet | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaOpenFreeVarSet' | [369, 1] | [400, 17] | simp only [Formula.open] | z x : String
phi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
j : ℕ
⊢ (forall_ x phi).freeVarSet ⊆ (Formula.open j (free_ z) (forall_ x phi)).freeVarSet | z x : String
phi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
j : ℕ
⊢ (forall_ x phi).freeVarSet ⊆ (forall_ x (Formula.open (j + 1) (free_ z) phi)).freeVarSet |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaOpenFreeVarSet' | [369, 1] | [400, 17] | simp only [Formula.freeVarSet] | z x : String
phi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
j : ℕ
⊢ (forall_ x phi).freeVarSet ⊆ (forall_ x (Formula.open (j + 1) (free_ z) phi)).freeVarSet | z x : String
phi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
j : ℕ
⊢ phi.freeVarSet ⊆ (Formula.open (j + 1) (free_ z) phi).freeVarSet |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaOpenFreeVarSet' | [369, 1] | [400, 17] | apply phi_ih | z x : String
phi : Formula
phi_ih : ∀ (j : ℕ), phi.freeVarSet ⊆ (Formula.open j (free_ z) phi).freeVarSet
j : ℕ
⊢ phi.freeVarSet ⊆ (Formula.open (j + 1) (free_ z) phi).freeVarSet | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | cases v | j : ℕ
z : String
v : Var
⊢ (Var.close j (free_ z) v).freeVarSet ⊆ v.freeVarSet \ {free_ z} | case free_
j : ℕ
z a✝ : String
⊢ (Var.close j (free_ z) (free_ a✝)).freeVarSet ⊆ (free_ a✝).freeVarSet \ {free_ z}
case bound_
j : ℕ
z : String
a✝ : ℕ
⊢ (Var.close j (free_ z) (bound_ a✝)).freeVarSet ⊆ (bound_ a✝).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | case free_ x =>
simp only [Var.close]
split_ifs
case _ c1 =>
simp only [Var.freeVarSet]
simp
case _ c1 =>
simp only [Var.freeVarSet]
simp
simp at c1
exact c1 | j : ℕ
z x : String
⊢ (Var.close j (free_ z) (free_ x)).freeVarSet ⊆ (free_ x).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | case bound_ i =>
simp only [Var.close]
split_ifs
case _ c1 =>
simp only [Var.freeVarSet]
simp
case _ c1 =>
simp only [Var.freeVarSet]
simp | j : ℕ
z : String
i : ℕ
⊢ (Var.close j (free_ z) (bound_ i)).freeVarSet ⊆ (bound_ i).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | simp only [Var.close] | j : ℕ
z x : String
⊢ (Var.close j (free_ z) (free_ x)).freeVarSet ⊆ (free_ x).freeVarSet \ {free_ z} | j : ℕ
z x : String
⊢ (if free_ x = free_ z then bound_ j else free_ x).freeVarSet ⊆ (free_ x).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | split_ifs | j : ℕ
z x : String
⊢ (if free_ x = free_ z then bound_ j else free_ x).freeVarSet ⊆ (free_ x).freeVarSet \ {free_ z} | case pos
j : ℕ
z x : String
h✝ : free_ x = free_ z
⊢ (bound_ j).freeVarSet ⊆ (free_ x).freeVarSet \ {free_ z}
case neg
j : ℕ
z x : String
h✝ : ¬free_ x = free_ z
⊢ (free_ x).freeVarSet ⊆ (free_ x).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | case _ c1 =>
simp only [Var.freeVarSet]
simp | j : ℕ
z x : String
c1 : free_ x = free_ z
⊢ (bound_ j).freeVarSet ⊆ (free_ x).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | case _ c1 =>
simp only [Var.freeVarSet]
simp
simp at c1
exact c1 | j : ℕ
z x : String
c1 : ¬free_ x = free_ z
⊢ (free_ x).freeVarSet ⊆ (free_ x).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | simp only [Var.freeVarSet] | j : ℕ
z x : String
c1 : free_ x = free_ z
⊢ (bound_ j).freeVarSet ⊆ (free_ x).freeVarSet \ {free_ z} | j : ℕ
z x : String
c1 : free_ x = free_ z
⊢ ∅ ⊆ {free_ x} \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | simp | j : ℕ
z x : String
c1 : free_ x = free_ z
⊢ ∅ ⊆ {free_ x} \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | simp only [Var.freeVarSet] | j : ℕ
z x : String
c1 : ¬free_ x = free_ z
⊢ (free_ x).freeVarSet ⊆ (free_ x).freeVarSet \ {free_ z} | j : ℕ
z x : String
c1 : ¬free_ x = free_ z
⊢ {free_ x} ⊆ {free_ x} \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | simp | j : ℕ
z x : String
c1 : ¬free_ x = free_ z
⊢ {free_ x} ⊆ {free_ x} \ {free_ z} | j : ℕ
z x : String
c1 : ¬free_ x = free_ z
⊢ ¬x = z |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | simp at c1 | j : ℕ
z x : String
c1 : ¬free_ x = free_ z
⊢ ¬x = z | j : ℕ
z x : String
c1 : ¬x = z
⊢ ¬x = z |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | exact c1 | j : ℕ
z x : String
c1 : ¬x = z
⊢ ¬x = z | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | simp only [Var.close] | j : ℕ
z : String
i : ℕ
⊢ (Var.close j (free_ z) (bound_ i)).freeVarSet ⊆ (bound_ i).freeVarSet \ {free_ z} | j : ℕ
z : String
i : ℕ
⊢ (if i < j then bound_ i else bound_ (i + 1)).freeVarSet ⊆ (bound_ i).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | split_ifs | j : ℕ
z : String
i : ℕ
⊢ (if i < j then bound_ i else bound_ (i + 1)).freeVarSet ⊆ (bound_ i).freeVarSet \ {free_ z} | case pos
j : ℕ
z : String
i : ℕ
h✝ : i < j
⊢ (bound_ i).freeVarSet ⊆ (bound_ i).freeVarSet \ {free_ z}
case neg
j : ℕ
z : String
i : ℕ
h✝ : ¬i < j
⊢ (bound_ (i + 1)).freeVarSet ⊆ (bound_ i).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | case _ c1 =>
simp only [Var.freeVarSet]
simp | j : ℕ
z : String
i : ℕ
c1 : i < j
⊢ (bound_ i).freeVarSet ⊆ (bound_ i).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | case _ c1 =>
simp only [Var.freeVarSet]
simp | j : ℕ
z : String
i : ℕ
c1 : ¬i < j
⊢ (bound_ (i + 1)).freeVarSet ⊆ (bound_ i).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | simp only [Var.freeVarSet] | j : ℕ
z : String
i : ℕ
c1 : i < j
⊢ (bound_ i).freeVarSet ⊆ (bound_ i).freeVarSet \ {free_ z} | j : ℕ
z : String
i : ℕ
c1 : i < j
⊢ ∅ ⊆ ∅ \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | simp | j : ℕ
z : String
i : ℕ
c1 : i < j
⊢ ∅ ⊆ ∅ \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | simp only [Var.freeVarSet] | j : ℕ
z : String
i : ℕ
c1 : ¬i < j
⊢ (bound_ (i + 1)).freeVarSet ⊆ (bound_ i).freeVarSet \ {free_ z} | j : ℕ
z : String
i : ℕ
c1 : ¬i < j
⊢ ∅ ⊆ ∅ \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarCloseFreeVarSet | [406, 1] | [432, 11] | simp | j : ℕ
z : String
i : ℕ
c1 : ¬i < j
⊢ ∅ ⊆ ∅ \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | induction F generalizing j | j : ℕ
z : String
F : Formula
⊢ (Formula.close j (free_ z) F).freeVarSet ⊆ F.freeVarSet \ {free_ z} | case pred_
z a✝¹ : String
a✝ : List Var
j : ℕ
⊢ (Formula.close j (free_ z) (pred_ a✝¹ a✝)).freeVarSet ⊆ (pred_ a✝¹ a✝).freeVarSet \ {free_ z}
case not_
z : String
a✝ : Formula
a_ih✝ : ∀ (j : ℕ), (Formula.close j (free_ z) a✝).freeVarSet ⊆ a✝.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) a✝.not_).freeVarSet ⊆ a✝.not_.freeVarSet \ {free_ z}
case imp_
z : String
a✝¹ a✝ : Formula
a_ih✝¹ : ∀ (j : ℕ), (Formula.close j (free_ z) a✝¹).freeVarSet ⊆ a✝¹.freeVarSet \ {free_ z}
a_ih✝ : ∀ (j : ℕ), (Formula.close j (free_ z) a✝).freeVarSet ⊆ a✝.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) (a✝¹.imp_ a✝)).freeVarSet ⊆ (a✝¹.imp_ a✝).freeVarSet \ {free_ z}
case forall_
z a✝¹ : String
a✝ : Formula
a_ih✝ : ∀ (j : ℕ), (Formula.close j (free_ z) a✝).freeVarSet ⊆ a✝.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) (forall_ a✝¹ a✝)).freeVarSet ⊆ (forall_ a✝¹ a✝).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | case not_ phi phi_ih =>
simp only [Formula.close]
simp only [Formula.freeVarSet]
apply phi_ih | z : String
phi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) phi.not_).freeVarSet ⊆ phi.not_.freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | case forall_ x phi phi_ih =>
simp only [Formula.close]
simp only [Formula.freeVarSet]
apply phi_ih | z x : String
phi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) (forall_ x phi)).freeVarSet ⊆ (forall_ x phi).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | simp only [Formula.close] | z X : String
vs : List Var
j : ℕ
⊢ (Formula.close j (free_ z) (pred_ X vs)).freeVarSet ⊆ (pred_ X vs).freeVarSet \ {free_ z} | z X : String
vs : List Var
j : ℕ
⊢ (pred_ X (List.map (Var.close j (free_ z)) vs)).freeVarSet ⊆ (pred_ X vs).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | simp only [Formula.freeVarSet] | z X : String
vs : List Var
j : ℕ
⊢ (pred_ X (List.map (Var.close j (free_ z)) vs)).freeVarSet ⊆ (pred_ X vs).freeVarSet \ {free_ z} | z X : String
vs : List Var
j : ℕ
⊢ (List.map (Var.close j (free_ z)) vs).toFinset.biUnion Var.freeVarSet ⊆ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | simp | z X : String
vs : List Var
j : ℕ
⊢ (List.map (Var.close j (free_ z)) vs).toFinset.biUnion Var.freeVarSet ⊆ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} | z X : String
vs : List Var
j : ℕ
⊢ ∀ a ∈ vs, (Var.close j (free_ z) a).freeVarSet ⊆ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | intro v a1 | z X : String
vs : List Var
j : ℕ
⊢ ∀ a ∈ vs, (Var.close j (free_ z) a).freeVarSet ⊆ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} | z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ (Var.close j (free_ z) v).freeVarSet ⊆ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | trans Var.freeVarSet v \ {free_ z} | z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ (Var.close j (free_ z) v).freeVarSet ⊆ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} | z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ (Var.close j (free_ z) v).freeVarSet ⊆ v.freeVarSet \ {free_ z}
z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ v.freeVarSet \ {free_ z} ⊆ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | exact VarCloseFreeVarSet j z v | z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ (Var.close j (free_ z) v).freeVarSet ⊆ v.freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | apply Finset.sdiff_subset_sdiff | z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ v.freeVarSet \ {free_ z} ⊆ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} | case hst
z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ v.freeVarSet ⊆ vs.toFinset.biUnion Var.freeVarSet
case hvu
z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ {free_ z} ⊆ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | apply Finset.subset_biUnion_of_mem | case hst
z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ v.freeVarSet ⊆ vs.toFinset.biUnion Var.freeVarSet | case hst.xs
z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ v ∈ vs.toFinset |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | simp | case hst.xs
z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ v ∈ vs.toFinset | case hst.xs
z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ v ∈ vs |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | exact a1 | case hst.xs
z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ v ∈ vs | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | simp | case hvu
z X : String
vs : List Var
j : ℕ
v : Var
a1 : v ∈ vs
⊢ {free_ z} ⊆ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | simp only [Formula.close] | z : String
phi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) phi.not_).freeVarSet ⊆ phi.not_.freeVarSet \ {free_ z} | z : String
phi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) phi).not_.freeVarSet ⊆ phi.not_.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | simp only [Formula.freeVarSet] | z : String
phi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) phi).not_.freeVarSet ⊆ phi.not_.freeVarSet \ {free_ z} | z : String
phi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | apply phi_ih | z : String
phi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | simp only [Formula.close] | z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
psi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) psi).freeVarSet ⊆ psi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) (phi.imp_ psi)).freeVarSet ⊆ (phi.imp_ psi).freeVarSet \ {free_ z} | z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
psi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) psi).freeVarSet ⊆ psi.freeVarSet \ {free_ z}
j : ℕ
⊢ ((Formula.close j (free_ z) phi).imp_ (Formula.close j (free_ z) psi)).freeVarSet ⊆
(phi.imp_ psi).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | simp only [Formula.freeVarSet] | z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
psi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) psi).freeVarSet ⊆ psi.freeVarSet \ {free_ z}
j : ℕ
⊢ ((Formula.close j (free_ z) phi).imp_ (Formula.close j (free_ z) psi)).freeVarSet ⊆
(phi.imp_ psi).freeVarSet \ {free_ z} | z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
psi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) psi).freeVarSet ⊆ psi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) phi).freeVarSet ∪ (Formula.close j (free_ z) psi).freeVarSet ⊆
(phi.freeVarSet ∪ psi.freeVarSet) \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | apply Finset.union_subset_diff | z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
psi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) psi).freeVarSet ⊆ psi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) phi).freeVarSet ∪ (Formula.close j (free_ z) psi).freeVarSet ⊆
(phi.freeVarSet ∪ psi.freeVarSet) \ {free_ z} | case h1
z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
psi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) psi).freeVarSet ⊆ psi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
case h2
z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
psi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) psi).freeVarSet ⊆ psi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) psi).freeVarSet ⊆ psi.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | exact phi_ih j | case h1
z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
psi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) psi).freeVarSet ⊆ psi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | exact psi_ih j | case h2
z : String
phi psi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
psi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) psi).freeVarSet ⊆ psi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) psi).freeVarSet ⊆ psi.freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | simp only [Formula.close] | z x : String
phi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close j (free_ z) (forall_ x phi)).freeVarSet ⊆ (forall_ x phi).freeVarSet \ {free_ z} | z x : String
phi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
j : ℕ
⊢ (forall_ x (Formula.close (1 + j) (free_ z) phi)).freeVarSet ⊆ (forall_ x phi).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | simp only [Formula.freeVarSet] | z x : String
phi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
j : ℕ
⊢ (forall_ x (Formula.close (1 + j) (free_ z) phi)).freeVarSet ⊆ (forall_ x phi).freeVarSet \ {free_ z} | z x : String
phi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close (1 + j) (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaCloseFreeVarSet | [435, 1] | [468, 17] | apply phi_ih | z x : String
phi : Formula
phi_ih : ∀ (j : ℕ), (Formula.close j (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z}
j : ℕ
⊢ (Formula.close (1 + j) (free_ z) phi).freeVarSet ⊆ phi.freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | cases v | z : String
t v : Var
⊢ ((free_ z).subst t v).freeVarSet ⊆ t.freeVarSet ∪ v.freeVarSet \ {free_ z} | case free_
z : String
t : Var
a✝ : String
⊢ ((free_ z).subst t (free_ a✝)).freeVarSet ⊆ t.freeVarSet ∪ (free_ a✝).freeVarSet \ {free_ z}
case bound_
z : String
t : Var
a✝ : ℕ
⊢ ((free_ z).subst t (bound_ a✝)).freeVarSet ⊆ t.freeVarSet ∪ (bound_ a✝).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | case free_ x =>
simp only [Var.subst]
split_ifs
case pos c1 =>
apply Finset.subset_union_left
case neg c1 =>
have s1 : Var.freeVarSet (free_ x) \ {free_ z} = {free_ x}
simp only [Var.freeVarSet]
simp
simp at c1
exact c1
simp only [s1]
apply Finset.subset_union_right | z : String
t : Var
x : String
⊢ ((free_ z).subst t (free_ x)).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | case bound_ i =>
simp only [Var.subst]
conv =>
lhs
simp only [Var.freeVarSet]
simp | z : String
t : Var
i : ℕ
⊢ ((free_ z).subst t (bound_ i)).freeVarSet ⊆ t.freeVarSet ∪ (bound_ i).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | simp only [Var.subst] | z : String
t : Var
x : String
⊢ ((free_ z).subst t (free_ x)).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} | z : String
t : Var
x : String
⊢ (if free_ z = free_ x then t else free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | split_ifs | z : String
t : Var
x : String
⊢ (if free_ z = free_ x then t else free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} | case pos
z : String
t : Var
x : String
h✝ : free_ z = free_ x
⊢ t.freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z}
case neg
z : String
t : Var
x : String
h✝ : ¬free_ z = free_ x
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | case pos c1 =>
apply Finset.subset_union_left | z : String
t : Var
x : String
c1 : free_ z = free_ x
⊢ t.freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | case neg c1 =>
have s1 : Var.freeVarSet (free_ x) \ {free_ z} = {free_ x}
simp only [Var.freeVarSet]
simp
simp at c1
exact c1
simp only [s1]
apply Finset.subset_union_right | z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | apply Finset.subset_union_left | z : String
t : Var
x : String
c1 : free_ z = free_ x
⊢ t.freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | have s1 : Var.freeVarSet (free_ x) \ {free_ z} = {free_ x} | z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} | case s1
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
⊢ (free_ x).freeVarSet \ {free_ z} = {free_ x}
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
s1 : (free_ x).freeVarSet \ {free_ z} = {free_ x}
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | simp only [Var.freeVarSet] | case s1
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
⊢ (free_ x).freeVarSet \ {free_ z} = {free_ x}
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
s1 : (free_ x).freeVarSet \ {free_ z} = {free_ x}
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} | case s1
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
⊢ {free_ x} \ {free_ z} = {free_ x}
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
s1 : (free_ x).freeVarSet \ {free_ z} = {free_ x}
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | simp | case s1
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
⊢ {free_ x} \ {free_ z} = {free_ x}
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
s1 : (free_ x).freeVarSet \ {free_ z} = {free_ x}
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} | case s1
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
⊢ ¬z = x
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
s1 : (free_ x).freeVarSet \ {free_ z} = {free_ x}
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | simp at c1 | case s1
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
⊢ ¬z = x
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
s1 : (free_ x).freeVarSet \ {free_ z} = {free_ x}
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} | case s1
z : String
t : Var
x : String
c1 : ¬z = x
⊢ ¬z = x
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
s1 : (free_ x).freeVarSet \ {free_ z} = {free_ x}
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | exact c1 | case s1
z : String
t : Var
x : String
c1 : ¬z = x
⊢ ¬z = x
z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
s1 : (free_ x).freeVarSet \ {free_ z} = {free_ x}
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} | z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
s1 : (free_ x).freeVarSet \ {free_ z} = {free_ x}
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | simp only [s1] | z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
s1 : (free_ x).freeVarSet \ {free_ z} = {free_ x}
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ (free_ x).freeVarSet \ {free_ z} | z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
s1 : (free_ x).freeVarSet \ {free_ z} = {free_ x}
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ {free_ x} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | apply Finset.subset_union_right | z : String
t : Var
x : String
c1 : ¬free_ z = free_ x
s1 : (free_ x).freeVarSet \ {free_ z} = {free_ x}
⊢ (free_ x).freeVarSet ⊆ t.freeVarSet ∪ {free_ x} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | simp only [Var.subst] | z : String
t : Var
i : ℕ
⊢ ((free_ z).subst t (bound_ i)).freeVarSet ⊆ t.freeVarSet ∪ (bound_ i).freeVarSet \ {free_ z} | z : String
t : Var
i : ℕ
⊢ (bound_ i).freeVarSet ⊆ t.freeVarSet ∪ (bound_ i).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | conv =>
lhs
simp only [Var.freeVarSet] | z : String
t : Var
i : ℕ
⊢ (bound_ i).freeVarSet ⊆ t.freeVarSet ∪ (bound_ i).freeVarSet \ {free_ z} | z : String
t : Var
i : ℕ
⊢ ∅ ⊆ t.freeVarSet ∪ (bound_ i).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet | [474, 1] | [500, 9] | simp | z : String
t : Var
i : ℕ
⊢ ∅ ⊆ t.freeVarSet ∪ (bound_ i).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | induction F | z : String
t : Var
F : Formula
⊢ (Formula.subst (free_ z) t F).freeVarSet ⊆ t.freeVarSet ∪ F.freeVarSet \ {free_ z} | case pred_
z : String
t : Var
a✝¹ : String
a✝ : List Var
⊢ (Formula.subst (free_ z) t (pred_ a✝¹ a✝)).freeVarSet ⊆ t.freeVarSet ∪ (pred_ a✝¹ a✝).freeVarSet \ {free_ z}
case not_
z : String
t : Var
a✝ : Formula
a_ih✝ : (Formula.subst (free_ z) t a✝).freeVarSet ⊆ t.freeVarSet ∪ a✝.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t a✝.not_).freeVarSet ⊆ t.freeVarSet ∪ a✝.not_.freeVarSet \ {free_ z}
case imp_
z : String
t : Var
a✝¹ a✝ : Formula
a_ih✝¹ : (Formula.subst (free_ z) t a✝¹).freeVarSet ⊆ t.freeVarSet ∪ a✝¹.freeVarSet \ {free_ z}
a_ih✝ : (Formula.subst (free_ z) t a✝).freeVarSet ⊆ t.freeVarSet ∪ a✝.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t (a✝¹.imp_ a✝)).freeVarSet ⊆ t.freeVarSet ∪ (a✝¹.imp_ a✝).freeVarSet \ {free_ z}
case forall_
z : String
t : Var
a✝¹ : String
a✝ : Formula
a_ih✝ : (Formula.subst (free_ z) t a✝).freeVarSet ⊆ t.freeVarSet ∪ a✝.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t (forall_ a✝¹ a✝)).freeVarSet ⊆ t.freeVarSet ∪ (forall_ a✝¹ a✝).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | case not_ phi phi_ih =>
simp only [Formula.subst]
simp only [Formula.freeVarSet]
exact phi_ih | z : String
t : Var
phi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t phi.not_).freeVarSet ⊆ t.freeVarSet ∪ phi.not_.freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | case forall_ x phi phi_ih =>
simp only [Formula.subst]
simp only [Formula.freeVarSet]
exact phi_ih | z : String
t : Var
x : String
phi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t (forall_ x phi)).freeVarSet ⊆ t.freeVarSet ∪ (forall_ x phi).freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | simp only [Formula.subst] | z : String
t : Var
X : String
vs : List Var
⊢ (Formula.subst (free_ z) t (pred_ X vs)).freeVarSet ⊆ t.freeVarSet ∪ (pred_ X vs).freeVarSet \ {free_ z} | z : String
t : Var
X : String
vs : List Var
⊢ (pred_ X (List.map ((free_ z).subst t) vs)).freeVarSet ⊆ t.freeVarSet ∪ (pred_ X vs).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | simp only [Formula.freeVarSet] | z : String
t : Var
X : String
vs : List Var
⊢ (pred_ X (List.map ((free_ z).subst t) vs)).freeVarSet ⊆ t.freeVarSet ∪ (pred_ X vs).freeVarSet \ {free_ z} | z : String
t : Var
X : String
vs : List Var
⊢ (List.map ((free_ z).subst t) vs).toFinset.biUnion Var.freeVarSet ⊆
t.freeVarSet ∪ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | simp | z : String
t : Var
X : String
vs : List Var
⊢ (List.map ((free_ z).subst t) vs).toFinset.biUnion Var.freeVarSet ⊆
t.freeVarSet ∪ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} | z : String
t : Var
X : String
vs : List Var
⊢ ∀ a ∈ vs, ((free_ z).subst t a).freeVarSet ⊆ t.freeVarSet ∪ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | intro v a1 | z : String
t : Var
X : String
vs : List Var
⊢ ∀ a ∈ vs, ((free_ z).subst t a).freeVarSet ⊆ t.freeVarSet ∪ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} | z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs
⊢ ((free_ z).subst t v).freeVarSet ⊆ t.freeVarSet ∪ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | trans Var.freeVarSet t ∪ Var.freeVarSet v \ {free_ z} | z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs
⊢ ((free_ z).subst t v).freeVarSet ⊆ t.freeVarSet ∪ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} | z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs
⊢ ((free_ z).subst t v).freeVarSet ⊆ t.freeVarSet ∪ v.freeVarSet \ {free_ z}
z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs
⊢ t.freeVarSet ∪ v.freeVarSet \ {free_ z} ⊆ t.freeVarSet ∪ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | exact VarSubstFreeVarSet z t v | z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs
⊢ ((free_ z).subst t v).freeVarSet ⊆ t.freeVarSet ∪ v.freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | apply Finset.union_subset_union_right | z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs
⊢ t.freeVarSet ∪ v.freeVarSet \ {free_ z} ⊆ t.freeVarSet ∪ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} | case h
z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs
⊢ v.freeVarSet \ {free_ z} ⊆ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | simp only [← List.mem_toFinset] at a1 | case h
z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs
⊢ v.freeVarSet \ {free_ z} ⊆ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} | case h
z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs.toFinset
⊢ v.freeVarSet \ {free_ z} ⊆ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | apply Finset.sdiff_subset_sdiff | case h
z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs.toFinset
⊢ v.freeVarSet \ {free_ z} ⊆ vs.toFinset.biUnion Var.freeVarSet \ {free_ z} | case h.hst
z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs.toFinset
⊢ v.freeVarSet ⊆ vs.toFinset.biUnion Var.freeVarSet
case h.hvu
z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs.toFinset
⊢ {free_ z} ⊆ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | apply Finset.subset_biUnion_of_mem Var.freeVarSet a1 | case h.hst
z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs.toFinset
⊢ v.freeVarSet ⊆ vs.toFinset.biUnion Var.freeVarSet | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | simp | case h.hvu
z : String
t : Var
X : String
vs : List Var
v : Var
a1 : v ∈ vs.toFinset
⊢ {free_ z} ⊆ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | simp only [Formula.subst] | z : String
t : Var
phi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t phi.not_).freeVarSet ⊆ t.freeVarSet ∪ phi.not_.freeVarSet \ {free_ z} | z : String
t : Var
phi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t phi).not_.freeVarSet ⊆ t.freeVarSet ∪ phi.not_.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | simp only [Formula.freeVarSet] | z : String
t : Var
phi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t phi).not_.freeVarSet ⊆ t.freeVarSet ∪ phi.not_.freeVarSet \ {free_ z} | z : String
t : Var
phi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | exact phi_ih | z : String
t : Var
phi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | simp only [Formula.subst] | z : String
t : Var
phi psi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
psi_ih : (Formula.subst (free_ z) t psi).freeVarSet ⊆ t.freeVarSet ∪ psi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t (phi.imp_ psi)).freeVarSet ⊆ t.freeVarSet ∪ (phi.imp_ psi).freeVarSet \ {free_ z} | z : String
t : Var
phi psi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
psi_ih : (Formula.subst (free_ z) t psi).freeVarSet ⊆ t.freeVarSet ∪ psi.freeVarSet \ {free_ z}
⊢ ((Formula.subst (free_ z) t phi).imp_ (Formula.subst (free_ z) t psi)).freeVarSet ⊆
t.freeVarSet ∪ (phi.imp_ psi).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | simp only [Formula.freeVarSet] | z : String
t : Var
phi psi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
psi_ih : (Formula.subst (free_ z) t psi).freeVarSet ⊆ t.freeVarSet ∪ psi.freeVarSet \ {free_ z}
⊢ ((Formula.subst (free_ z) t phi).imp_ (Formula.subst (free_ z) t psi)).freeVarSet ⊆
t.freeVarSet ∪ (phi.imp_ psi).freeVarSet \ {free_ z} | z : String
t : Var
phi psi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
psi_ih : (Formula.subst (free_ z) t psi).freeVarSet ⊆ t.freeVarSet ∪ psi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t phi).freeVarSet ∪ (Formula.subst (free_ z) t psi).freeVarSet ⊆
t.freeVarSet ∪ (phi.freeVarSet ∪ psi.freeVarSet) \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | apply Finset.union_subset_left_right_diff | z : String
t : Var
phi psi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
psi_ih : (Formula.subst (free_ z) t psi).freeVarSet ⊆ t.freeVarSet ∪ psi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t phi).freeVarSet ∪ (Formula.subst (free_ z) t psi).freeVarSet ⊆
t.freeVarSet ∪ (phi.freeVarSet ∪ psi.freeVarSet) \ {free_ z} | case h1
z : String
t : Var
phi psi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
psi_ih : (Formula.subst (free_ z) t psi).freeVarSet ⊆ t.freeVarSet ∪ psi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
case h2
z : String
t : Var
phi psi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
psi_ih : (Formula.subst (free_ z) t psi).freeVarSet ⊆ t.freeVarSet ∪ psi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t psi).freeVarSet ⊆ t.freeVarSet ∪ psi.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | exact phi_ih | case h1
z : String
t : Var
phi psi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
psi_ih : (Formula.subst (free_ z) t psi).freeVarSet ⊆ t.freeVarSet ∪ psi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | exact psi_ih | case h2
z : String
t : Var
phi psi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
psi_ih : (Formula.subst (free_ z) t psi).freeVarSet ⊆ t.freeVarSet ∪ psi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t psi).freeVarSet ⊆ t.freeVarSet ∪ psi.freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | simp only [Formula.subst] | z : String
t : Var
x : String
phi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t (forall_ x phi)).freeVarSet ⊆ t.freeVarSet ∪ (forall_ x phi).freeVarSet \ {free_ z} | z : String
t : Var
x : String
phi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
⊢ (forall_ x (Formula.subst (free_ z) t phi)).freeVarSet ⊆ t.freeVarSet ∪ (forall_ x phi).freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | simp only [Formula.freeVarSet] | z : String
t : Var
x : String
phi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
⊢ (forall_ x (Formula.subst (free_ z) t phi)).freeVarSet ⊆ t.freeVarSet ∪ (forall_ x phi).freeVarSet \ {free_ z} | z : String
t : Var
x : String
phi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z} |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.FormulaSubstFreeVarSet | [503, 1] | [536, 17] | exact phi_ih | z : String
t : Var
x : String
phi : Formula
phi_ih : (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z}
⊢ (Formula.subst (free_ z) t phi).freeVarSet ⊆ t.freeVarSet ∪ phi.freeVarSet \ {free_ z} | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet' | [540, 1] | [562, 33] | cases v | z : String
t v : Var
⊢ v.freeVarSet \ {free_ z} ⊆ ((free_ z).subst t v).freeVarSet | case free_
z : String
t : Var
a✝ : String
⊢ (free_ a✝).freeVarSet \ {free_ z} ⊆ ((free_ z).subst t (free_ a✝)).freeVarSet
case bound_
z : String
t : Var
a✝ : ℕ
⊢ (bound_ a✝).freeVarSet \ {free_ z} ⊆ ((free_ z).subst t (bound_ a✝)).freeVarSet |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet' | [540, 1] | [562, 33] | case free_ x =>
simp only [Var.subst]
split_ifs
case pos c1 =>
simp only [c1]
conv =>
lhs
simp only [Var.freeVarSet]
simp
case neg c1 =>
simp only [Var.freeVarSet]
exact Finset.sdiff_subset {free_ x} {free_ z} | z : String
t : Var
x : String
⊢ (free_ x).freeVarSet \ {free_ z} ⊆ ((free_ z).subst t (free_ x)).freeVarSet | no goals |
https://github.com/pthomas505/FOL.git | 097a4abea51b641d144539b9a0f7516f3b9d818c | FOL/LN/Paper.lean | LN.VarSubstFreeVarSet' | [540, 1] | [562, 33] | case bound_ i =>
conv =>
lhs
simp only [Var.freeVarSet] | z : String
t : Var
i : ℕ
⊢ (bound_ i).freeVarSet \ {free_ z} ⊆ ((free_ z).subst t (bound_ i)).freeVarSet | z : String
t : Var
i : ℕ
⊢ ∅ \ {free_ z} ⊆ ((free_ z).subst t (bound_ i)).freeVarSet |
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