Step
*
1
2
1
2
of Lemma
decidable__all_fset
1. [T] : Type
2. eq : EqDecider(T)@i
3. [P] : T ⟶ ℙ
4. ∀x:T. Dec(P[x])@i
5. s : fset(T)@i
6. p : T ⟶ 𝔹
7. ∀x:T. uiff(P[x];↑(p x))
8. Dec(∀[x:T]. ↑(p x) supposing x ∈ s)
⊢ Dec(∀x:T. ↑(p x) supposing x ∈ s)
BY
{ RepeatFor 4 (ParallelLast) }
Latex:
Latex:
1. [T] : Type
2. eq : EqDecider(T)@i
3. [P] : T {}\mrightarrow{} \mBbbP{}
4. \mforall{}x:T. Dec(P[x])@i
5. s : fset(T)@i
6. p : T {}\mrightarrow{} \mBbbB{}
7. \mforall{}x:T. uiff(P[x];\muparrow{}(p x))
8. Dec(\mforall{}[x:T]. \muparrow{}(p x) supposing x \mmember{} s)
\mvdash{} Dec(\mforall{}x:T. \muparrow{}(p x) supposing x \mmember{} s)
By
Latex:
RepeatFor 4 (ParallelLast)
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