Step
*
of Lemma
ite_wf
∀[b:𝔹]. ∀[T:Type]. ∀[x:T supposing ↑b]. ∀[y:T supposing ¬↑b]. (ite(b;x;y) ∈ T)
BY
{ ((UnivCD THENA Auto) THEN Unfold `ite` 0 THEN D 1 THEN All (RepUR ``assert``) THEN Reduce 0) }
1
1. x1 : Unit
2. T : Type
3. x : T supposing True
4. y : T supposing ¬True
⊢ x ∈ T
2
1. y1 : Unit
2. T : Type
3. x : T supposing False
4. y : T supposing ¬False
⊢ y ∈ T
Latex:
Latex:
\mforall{}[b:\mBbbB{}]. \mforall{}[T:Type]. \mforall{}[x:T supposing \muparrow{}b]. \mforall{}[y:T supposing \mneg{}\muparrow{}b]. (ite(b;x;y) \mmember{} T)
By
Latex:
((UnivCD THENA Auto) THEN Unfold `ite` 0 THEN D 1 THEN All (RepUR ``assert``) THEN Reduce 0)
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