Step
*
2
1
2
1
of Lemma
intuitionistic-pigeonhole
1. A : ℕ ⟶ ℙ@i'
2. B : ℕ ⟶ ℙ@i'
3. ∀s:StrictInc. ⇃(∃n:ℕ. A[s n])@i
4. ∀s:StrictInc. ⇃(∃n:ℕ. B[s n])@i
5. s : StrictInc@i
6. ∃F:StrictInc ⟶ ℕ. ∀f:StrictInc. B[f (F f)]@i
7. s1 : StrictInc@i
⊢ ∃n:ℕ. B[s1 n]
BY
{ ExRepD }
1
1. A : ℕ ⟶ ℙ@i'
2. B : ℕ ⟶ ℙ@i'
3. ∀s:StrictInc. ⇃(∃n:ℕ. A[s n])@i
4. ∀s:StrictInc. ⇃(∃n:ℕ. B[s n])@i
5. s : StrictInc@i
6. F : StrictInc ⟶ ℕ@i
7. ∀f:StrictInc. B[f (F f)]@i
8. s1 : StrictInc@i
⊢ ∃n:ℕ. B[s1 n]
Latex:
Latex:
1. A : \mBbbN{} {}\mrightarrow{} \mBbbP{}@i'
2. B : \mBbbN{} {}\mrightarrow{} \mBbbP{}@i'
3. \mforall{}s:StrictInc. \00D9(\mexists{}n:\mBbbN{}. A[s n])@i
4. \mforall{}s:StrictInc. \00D9(\mexists{}n:\mBbbN{}. B[s n])@i
5. s : StrictInc@i
6. \mexists{}F:StrictInc {}\mrightarrow{} \mBbbN{}. \mforall{}f:StrictInc. B[f (F f)]@i
7. s1 : StrictInc@i
\mvdash{} \mexists{}n:\mBbbN{}. B[s1 n]
By
Latex:
ExRepD
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