Step
*
of Lemma
exists-product5
∀[A,B,C,D,E,F:Type].
∀P:(A × B × C × D × E × F) ⟶ ℙ'
{∃x:A × B × C × D × E × F. P[x]
⇐⇒ ∃a:A. ∃b:B. ∃c:C. ∃d:D. ∃e:E. ∃f:F. P[<a, b, c, d, e, f>]}
BY
{ (Unfold `guard` 0 THEN ((UnivCD THENA Auto) THEN (RWW "exists-product1" 0 THENA Auto) THEN Auto)) }
Latex:
Latex:
\mforall{}[A,B,C,D,E,F:Type].
\mforall{}P:(A \mtimes{} B \mtimes{} C \mtimes{} D \mtimes{} E \mtimes{} F) {}\mrightarrow{} \mBbbP{}'
\{\mexists{}x:A \mtimes{} B \mtimes{} C \mtimes{} D \mtimes{} E \mtimes{} F. P[x] \mLeftarrow{}{}\mRightarrow{} \mexists{}a:A. \mexists{}b:B. \mexists{}c:C. \mexists{}d:D. \mexists{}e:E. \mexists{}f:F. P[<a, b, c, d, e, f>]\}
By
Latex:
(Unfold `guard` 0 THEN ((UnivCD THENA Auto) THEN (RWW "exists-product1" 0 THENA Auto) THEN Auto))
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