Step
*
1
1
of Lemma
unary-strong-almost-full-has-strict-inc
1. [A] : ℕ ⟶ ℙ
2. ∀s:StrictInc. ∃n:ℕ. A[s n]
3. m : ℕ
4. ∃n:ℕ. A[(λi.(m + i + 1)) n]
⊢ ∃n:ℕ. (m < n ∧ A[n])
BY
{ (Reduce -1 THEN ExRepD THEN Auto) }
Latex:
Latex:
1. [A] : \mBbbN{} {}\mrightarrow{} \mBbbP{}
2. \mforall{}s:StrictInc. \mexists{}n:\mBbbN{}. A[s n]
3. m : \mBbbN{}
4. \mexists{}n:\mBbbN{}. A[(\mlambda{}i.(m + i + 1)) n]
\mvdash{} \mexists{}n:\mBbbN{}. (m < n \mwedge{} A[n])
By
Latex:
(Reduce -1 THEN ExRepD THEN Auto)
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