Step
*
of Lemma
decidable__list-match
∀[A,B:Type]. ∀[R:A ⟶ B ⟶ ℙ].
((∀a:A. ∀b:B. Dec(R[a;b]))
⇒ (∀as:A List. ∀bs:B List. Dec(list-match(as;bs;a,b.R[a;b]))))
BY
{ Auto }
1
.....decidable?.....
1. [A] : Type
2. [B] : Type
3. [R] : A ⟶ B ⟶ ℙ
4. ∀a:A. ∀b:B. Dec(R[a;b])
5. as : A List
6. bs : B List
⊢ Dec(list-match(as;bs;a,b.R[a;b]))
Latex:
Latex:
\mforall{}[A,B:Type]. \mforall{}[R:A {}\mrightarrow{} B {}\mrightarrow{} \mBbbP{}].
((\mforall{}a:A. \mforall{}b:B. Dec(R[a;b])) {}\mRightarrow{} (\mforall{}as:A List. \mforall{}bs:B List. Dec(list-match(as;bs;a,b.R[a;b]))))
By
Latex:
Auto
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