Step
*
1
of Lemma
not-not-finite-exists-or-all
1. T : Type
2. n : ℕ
3. T ~ ℕn
4. P : T ⟶ ℙ
5. ∀i:T. (P[i] ∨ (¬P[i]))
⊢ (∃i:T. P[i]) ∨ (∀i:T. (¬P[i]))
BY
{ ((Assert ℕn ~ T BY EAuto 1) THEN D -1) }
1
1. T : Type
2. n : ℕ
3. T ~ ℕn
4. P : T ⟶ ℙ
5. ∀i:T. (P[i] ∨ (¬P[i]))
6. f : ℕn ⟶ T
7. Bij(ℕn;T;f)
⊢ (∃i:T. P[i]) ∨ (∀i:T. (¬P[i]))
Latex:
Latex:
1. T : Type
2. n : \mBbbN{}
3. T \msim{} \mBbbN{}n
4. P : T {}\mrightarrow{} \mBbbP{}
5. \mforall{}i:T. (P[i] \mvee{} (\mneg{}P[i]))
\mvdash{} (\mexists{}i:T. P[i]) \mvee{} (\mforall{}i:T. (\mneg{}P[i]))
By
Latex:
((Assert \mBbbN{}n \msim{} T BY EAuto 1) THEN D -1)
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