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Step * 1 of Lemma dm-neg-is-hom-opposite


1. T : Type
2. eq : EqDecider(T)
⊢ λx.¬(x) ∈ Hom(opposite-lattice(free-DeMorgan-lattice(T;eq));free-DeMorgan-lattice(T;eq))
BY
{ (MemTypeCD THEN Reduce 0 THEN Auto) }

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Latex:

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Latex:

1.  T  :  Type
2.  eq  :  EqDecider(T)
\mvdash{}  \mlambda{}x.\mneg{}(x)  \mmember{}  Hom(opposite-lattice(free-DeMorgan-lattice(T;eq));free-DeMorgan-lattice(T;eq))


By

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Latex:
(MemTypeCD  THEN  Reduce  0  THEN  Auto)

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