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Step * of Lemma co-w-null_wf

∀[A:Type]. ∀[w:co-w(A)].  (co-w-null(w) ∈ 𝔹)
BY
{ (Auto THEN InstLemma `co-w-ext` [⌜A⌝]⋅ THEN Auto) }

1
1. A : Type
2. w : co-w(A)
3. co-w(A) ≡ Unit + (A ⟶ co-w(A))
⊢ co-w-null(w) ∈ 𝔹

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Latex:

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Latex:
\mforall{}[A:Type].  \mforall{}[w:co-w(A)].    (co-w-null(w)  \mmember{}  \mBbbB{})


By

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Latex:
(Auto  THEN  InstLemma  `co-w-ext`  [\mkleeneopen{}A\mkleeneclose{}]\mcdot{}  THEN  Auto)

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