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Step * 1 1 of Lemma bexists_iff_exists_nth


1. s : DSet
2. f : |s| ⟶ 𝔹
⊢ False ⇐⇒ ∃n:ℕ0. (↑f[⊥])
BY
{ TACTIC:(Auto THEN ExRepD THEN Auto) }

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Latex:

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Latex:

1.  s  :  DSet
2.  f  :  |s|  {}\mrightarrow{}  \mBbbB{}
\mvdash{}  False  \mLeftarrow{}{}\mRightarrow{}  \mexists{}n:\mBbbN{}0.  (\muparrow{}f[\mbot{}])


By

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Latex:
TACTIC:(Auto  THEN  ExRepD  THEN  Auto)

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