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Step * 1 4 1 of Lemma dm-neg-neg


1. T : Type
2. eq : EqDecider(T)
3. x : Point(free-DeMorgan-lattice(T;eq))
4. ∀g,h:Hom(free-dist-lattice(T + T; union-deq(T;T;eq;eq));free-dist-lattice(T + T; union-deq(T;T;eq;eq))).
     (((λz.free-dl-inc(z))
      = (g o (λx.free-dl-inc(x)))
      ∈ ((T + T) ⟶ Point(free-dist-lattice(T + T; union-deq(T;T;eq;eq)))))
     ⇒ ((λz.free-dl-inc(z))
        = (h o (λx.free-dl-inc(x)))
        ∈ ((T + T) ⟶ Point(free-dist-lattice(T + T; union-deq(T;T;eq;eq)))))
     ⇒ (g = h ∈ Hom(free-dist-lattice(T + T; union-deq(T;T;eq;eq));free-dist-lattice(T + T; union-deq(T;T;eq;eq)))))
5. x1 : T + T
⊢ free-dl-inc(x1) = ¬(¬(free-dl-inc(x1))) ∈ Point(free-dist-lattice(T + T; union-deq(T;T;eq;eq)))
BY
{ skip{D -1} }

1
1. T : Type
2. eq : EqDecider(T)
3. x : Point(free-DeMorgan-lattice(T;eq))
4. ∀g,h:Hom(free-dist-lattice(T + T; union-deq(T;T;eq;eq));free-dist-lattice(T + T; union-deq(T;T;eq;eq))).
     (((λz.free-dl-inc(z))
      = (g o (λx.free-dl-inc(x)))
      ∈ ((T + T) ⟶ Point(free-dist-lattice(T + T; union-deq(T;T;eq;eq)))))
     ⇒ ((λz.free-dl-inc(z))
        = (h o (λx.free-dl-inc(x)))
        ∈ ((T + T) ⟶ Point(free-dist-lattice(T + T; union-deq(T;T;eq;eq)))))
     ⇒ (g = h ∈ Hom(free-dist-lattice(T + T; union-deq(T;T;eq;eq));free-dist-lattice(T + T; union-deq(T;T;eq;eq)))))
5. x1 : T + T
⊢ free-dl-inc(x1) = ¬(¬(free-dl-inc(x1))) ∈ Point(free-dist-lattice(T + T; union-deq(T;T;eq;eq)))

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Latex:

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Latex:

1.  T  :  Type
2.  eq  :  EqDecider(T)
3.  x  :  Point(free-DeMorgan-lattice(T;eq))
4.  \mforall{}g,h:Hom(free-dist-lattice(T  +  T;  union-deq(T;T;eq;eq));free-dist-lattice(T  +  T;
                                                                                                                                                          union-deq(T;T;eq;eq))).
          (((\mlambda{}z.free-dl-inc(z))  =  (g  o  (\mlambda{}x.free-dl-inc(x))))
          {}\mRightarrow{}  ((\mlambda{}z.free-dl-inc(z))  =  (h  o  (\mlambda{}x.free-dl-inc(x))))
          {}\mRightarrow{}  (g  =  h))
5.  x1  :  T  +  T
\mvdash{}  free-dl-inc(x1)  =  \mneg{}(\mneg{}(free-dl-inc(x1)))


By

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Latex:
skip\{D  -1\}

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