Theorem: Turing.PartrecToTM2.trStmts₁_trans
File: Mathlib/Computability/TMToPartrec.lean

Proof steps:
state_before: q q' : Λ'
⊢ q' ∈ trStmts₁ q → trStmts₁ q' ⊆ trStmts₁ q
state_after: case move
q' : Λ'
p✝ : Γ' → Bool
k₁✝ k₂✝ : K'
q : Λ'
q_ih : q' ∈ trStmts₁ q → trStmts₁ q' ⊆ trStmts₁ q
⊢ q' ∈ trStmts₁ q → trStmts₁ q' ⊆ insert (Λ'.move p✝ k₁✝ k₂✝ q) (trStmts₁ q)

case clear
q' : Λ'
p✝ : Γ' → Bool
k✝ : K'
q : Λ'
q_ih : q' ∈ trStmts₁ q → trStmts₁ q' ⊆ trStmts₁ q
⊢ q' ∈ trStmts₁ q → trStmts₁ q' ⊆ insert (Λ'.clear p✝ k✝ q) (trStmts₁ q)

case copy
q' q : Λ'
q_ih : q' ∈ trStmts₁ q → trStmts₁ q' ⊆ trStmts₁ q
⊢ q' ∈ trStmts₁ q → trStmts₁ q' ⊆ insert q.copy (trStmts₁ q)

case push
q' : Λ'
k✝ : K'
s✝ : Option Γ' → Option Γ'
q : Λ'
q_ih : q' ∈ trStmts₁ q → trStmts₁ q' ⊆ trStmts₁ q
⊢ q' ∈ trStmts₁ q → trStmts₁ q' ⊆ insert (Λ'.push k✝ s✝ q) (trStmts₁ q)

case read
q' : Λ'
q : Option Γ' → Λ'
q_ih : ∀ (a : Option Γ'), q' ∈ trStmts₁ (q a) → trStmts₁ q' ⊆ trStmts₁ (q a)
⊢ (q' ∈ Finset.univ.biUnion fun s => trStmts₁ (q s)) →
    trStmts₁ q' ⊆ insert (Λ'.read q) (Finset.univ.biUnion fun s => trStmts₁ (q s))

case succ
q' q : Λ'
q_ih : q' ∈ trStmts₁ q → trStmts₁ q' ⊆ trStmts₁ q
⊢ (q' = unrev q →
      insert (Λ'.move (fun x => false) rev main q) (trStmts₁ q) ⊆ insert q.succ (insert (unrev q) (trStmts₁ q))) ∧
    (q' ∈ trStmts₁ q → trStmts₁ q' ⊆ insert q.succ (insert (unrev q) (trStmts₁ q)))

case pred
q' q₁ q₂ : Λ'
q₁_ih : q' ∈ trStmts₁ q₁ → trStmts₁ q' ⊆ trStmts₁ q₁
q₂_ih : q' ∈ trStmts₁ q₂ → trStmts₁ q' ⊆ trStmts₁ q₂
⊢ (q' ∈ trStmts₁ q₁ → trStmts₁ q' ⊆ insert (q₁.pred q₂) (trStmts₁ q₁ ∪ insert (unrev q₂) (trStmts₁ q₂))) ∧
    (q' = unrev q₂ →
        insert (Λ'.move (fun x => false) rev main q₂) (trStmts₁ q₂) ⊆
          insert (q₁.pred q₂) (trStmts₁ q₁ ∪ insert (unrev q₂) (trStmts₁ q₂))) ∧
      (q' ∈ trStmts₁ q₂ → trStmts₁ q' ⊆ insert (q₁.pred q₂) (trStmts₁ q₁ ∪ insert (unrev q₂) (trStmts₁ q₂)))
tactic: induction' q with _ _ _ q q_ih _ _ q q_ih q q_ih _ _ q q_ih q q_ih q q_ih q₁ q₂ q₁_ih q₂_ih _ <;>
    simp (config := { contextual := true }) only [trStmts₁, Finset.mem_insert, Finset.mem_union,
      or_imp, Finset.mem_singleton, Finset.Subset.refl, imp_true_iff, true_and_iff]
state_before: case move
q' : Λ'
p✝ : Γ' → Bool
k₁✝ k₂✝ : K'
q : Λ'
q_ih : q' ∈ trStmts₁ q → trStmts₁ q' ⊆ trStmts₁ q
⊢ q' ∈ trStmts₁ q → trStmts₁ q' ⊆ insert (Λ'.move p✝ k₁✝ k₂✝ q) (trStmts₁ q)

case clear
q' : Λ'
p✝ : Γ' → Bool
k✝ : K'
q : Λ'
q_ih : q' ∈ trStmts₁ q → trStmts₁ q' ⊆ trStmts₁ q
⊢ q' ∈ trStmts₁ q → trStmts₁ q' ⊆ insert (Λ'.clear p✝ k✝ q) (trStmts₁ q)

case copy
q' q : Λ'
q_ih : q' ∈ trStmts₁ q → trStmts₁ q' ⊆ trStmts₁ q
⊢ q' ∈ trStmts₁ q → trStmts₁ q' ⊆ insert q.copy (trStmts₁ q)

case push
q' : Λ'
k✝ : K'
s✝ : Option Γ' → Option Γ'
q : Λ'
q_ih : q' ∈ trStmts₁ q → trStmts₁ q' ⊆ trStmts₁ q
⊢ q' ∈ trStmts₁ q → trStmts₁ q' ⊆ insert (Λ'.push k✝ s✝ q) (trStmts₁ q)

case read
q' : Λ'
q : Option Γ' → Λ'
q_ih : ∀ (a : Option Γ'), q' ∈ trStmts₁ (q a) → trStmts₁ q' ⊆ trStmts₁ (q a)
⊢ (q' ∈ Finset.univ.biUnion fun s => trStmts₁ (q s)) →
    trStmts₁ q' ⊆ insert (Λ'.read q) (Finset.univ.biUnion fun s => trStmts₁ (q s))

case succ
q' q : Λ'
q_ih : q' ∈ trStmts₁ q → trStmts₁ q' ⊆ trStmts₁ q
⊢ (q' = unrev q →
      insert (Λ'.move (fun x => false) rev main q) (trStmts₁ q) ⊆ insert q.succ (insert (unrev q) (trStmts₁ q))) ∧
    (q' ∈ trStmts₁ q → trStmts₁ q' ⊆ insert q.succ (insert (unrev q) (trStmts₁ q)))

case pred
q' q₁ q₂ : Λ'
q₁_ih : q' ∈ trStmts₁ q₁ → trStmts₁ q' ⊆ trStmts₁ q₁
q₂_ih : q' ∈ trStmts₁ q₂ → trStmts₁ q' ⊆ trStmts₁ q₂
⊢ (q' ∈ trStmts₁ q₁ → trStmts₁ q' ⊆ insert (q₁.pred q₂) (trStmts₁ q₁ ∪ insert (unrev q₂) (trStmts₁ q₂))) ∧
    (q' = unrev q₂ →
        insert (Λ'.move (fun x => false) rev main q₂) (trStmts₁ q₂) ⊆
          insert (q₁.pred q₂) (trStmts₁ q₁ ∪ insert (unrev q₂) (trStmts₁ q₂))) ∧
      (q' ∈ trStmts₁ q₂ → trStmts₁ q' ⊆ insert (q₁.pred q₂) (trStmts₁ q₁ ∪ insert (unrev q₂) (trStmts₁ q₂)))
state_after: case read
q' : Λ'
q : Option Γ' → Λ'
q_ih : ∀ (a : Option Γ'), q' ∈ trStmts₁ (q a) → trStmts₁ q' ⊆ trStmts₁ (q a)
⊢ (q' ∈ Finset.univ.biUnion fun s => trStmts₁ (q s)) →
    trStmts₁ q' ⊆ insert (Λ'.read q) (Finset.univ.biUnion fun s => trStmts₁ (q s))

case succ
q' q : Λ'
q_ih : q' ∈ trStmts₁ q → trStmts₁ q' ⊆ trStmts₁ q
⊢ (q' = unrev q →
      insert (Λ'.move (fun x => false) rev main q) (trStmts₁ q) ⊆ insert q.succ (insert (unrev q) (trStmts₁ q))) ∧
    (q' ∈ trStmts₁ q → trStmts₁ q' ⊆ insert q.succ (insert (unrev q) (trStmts₁ q)))

case pred
q' q₁ q₂ : Λ'
q₁_ih : q' ∈ trStmts₁ q₁ → trStmts₁ q' ⊆ trStmts₁ q₁
q₂_ih : q' ∈ trStmts₁ q₂ → trStmts₁ q' ⊆ trStmts₁ q₂
⊢ (q' ∈ trStmts₁ q₁ → trStmts₁ q' ⊆ insert (q₁.pred q₂) (trStmts₁ q₁ ∪ insert (unrev q₂) (trStmts₁ q₂))) ∧
    (q' = unrev q₂ →
        insert (Λ'.move (fun x => false) rev main q₂) (trStmts₁ q₂) ⊆
          insert (q₁.pred q₂) (trStmts₁ q₁ ∪ insert (unrev q₂) (trStmts₁ q₂))) ∧
      (q' ∈ trStmts₁ q₂ → trStmts₁ q' ⊆ insert (q₁.pred q₂) (trStmts₁ q₁ ∪ insert (unrev q₂) (trStmts₁ q₂)))
tactic: repeat exact fun h => Finset.Subset.trans (q_ih h) (Finset.subset_insert _ _)