Step
*
1
1
of Lemma
list-functor
.....subterm..... T:t
1:n
1. T : Type
2. X : ℕ ⟶ Type
3. x : ⋂n:ℕ. (Unit ⋃ (T × (X n)))
⊢ x ∈ Unit ⋃ (T × (⋂n:ℕ. (X n)))
BY
{ (Decide ⌜isaxiom(x) = tt⌝⋅ THENA Auto) }
1
.....wf.....
1. T : Type
2. X : ℕ ⟶ Type
3. x : ⋂n:ℕ. (Unit ⋃ (T × (X n)))
⊢ isaxiom(x) ∈ 𝔹
2
1. T : Type
2. X : ℕ ⟶ Type
3. x : ⋂n:ℕ. (Unit ⋃ (T × (X n)))
4. isaxiom(x) = tt
⊢ x ∈ Unit ⋃ (T × (⋂n:ℕ. (X n)))
3
1. T : Type
2. X : ℕ ⟶ Type
3. x : ⋂n:ℕ. (Unit ⋃ (T × (X n)))
4. ¬isaxiom(x) = tt
⊢ x ∈ Unit ⋃ (T × (⋂n:ℕ. (X n)))
Latex:
Latex:
.....subterm..... T:t
1:n
1. T : Type
2. X : \mBbbN{} {}\mrightarrow{} Type
3. x : \mcap{}n:\mBbbN{}. (Unit \mcup{} (T \mtimes{} (X n)))
\mvdash{} x \mmember{} Unit \mcup{} (T \mtimes{} (\mcap{}n:\mBbbN{}. (X n)))
By
Latex:
(Decide \mkleeneopen{}isaxiom(x) = tt\mkleeneclose{}\mcdot{} THENA Auto)
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