Step
*
1
1
of Lemma
increasing-baire-eq-from
1. n : ℕ
2. a : ℕ ⟶ ℕ
3. k : ℕ
4. increasing-sequence(a)
5. ¬n + 1 < n + 1
6. n < n + 1
7. k = (n + 1) ∈ ℕ
⊢ ((a (n + 1)) = (a n) ∈ ℕ) ∨ ((a (n + 1)) = ((a n) + 1) ∈ ℕ)
BY
{ (Unfold `increasing-sequence` (-4) THEN Auto) }
Latex:
Latex:
1. n : \mBbbN{}
2. a : \mBbbN{} {}\mrightarrow{} \mBbbN{}
3. k : \mBbbN{}
4. increasing-sequence(a)
5. \mneg{}n + 1 < n + 1
6. n < n + 1
7. k = (n + 1)
\mvdash{} ((a (n + 1)) = (a n)) \mvee{} ((a (n + 1)) = ((a n) + 1))
By
Latex:
(Unfold `increasing-sequence` (-4) THEN Auto)
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