Step
*
1
1
of Lemma
choice-iff-canonicalizable
1. T : Type
2. ∀P:T ⟶ ℙ. (∀t:T. ⇃(P[t])
⇐⇒ ⇃(∀t:T. P[t]))
3. t : T
⊢ ⇃(∃x:Base. (t = x ∈ T))
BY
{ UseWitness ⌜<t, Ax>⌝⋅ }
1
1. T : Type
2. ∀P:T ⟶ ℙ. (∀t:T. ⇃(P[t])
⇐⇒ ⇃(∀t:T. P[t]))
3. t : T
⊢ <t, Ax> ∈ ⇃(∃x:Base. (t = x ∈ T))
Latex:
Latex:
1. T : Type
2. \mforall{}P:T {}\mrightarrow{} \mBbbP{}. (\mforall{}t:T. \00D9(P[t]) \mLeftarrow{}{}\mRightarrow{} \00D9(\mforall{}t:T. P[t]))
3. t : T
\mvdash{} \00D9(\mexists{}x:Base. (t = x))
By
Latex:
UseWitness \mkleeneopen{}<t, Ax>\mkleeneclose{}\mcdot{}
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