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Step * of Lemma dm-neg-opp

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∀[T:Type]. ∀[eq:EqDecider(T)]. ∀[i:T].  (¬(<1-i>) = <i> ∈ Point(free-DeMorgan-lattice(T;eq)))
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{ (Auto THEN Unfold `free-DeMorgan-lattice` 0) }

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1. T : Type
2. eq : EqDecider(T)
3. i : T
⊢ ¬(<1-i>) = <i> ∈ Point(free-dist-lattice(T + T; union-deq(T;T;eq;eq)))

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Latex:

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Latex:
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\mforall{}[T:Type].  \mforall{}[eq:EqDecider(T)].  \mforall{}[i:T].    (\mneg{}(ə-i>)  =  <i>)


By

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Latex:
(Auto  THEN  Unfold  `free-DeMorgan-lattice`  0)

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