Step
*
1
2
of Lemma
sq_stable__metric-subspace
1. [X] : Type
2. [d] : metric(X)
3. [A] : Type
4. strong-subtype(A;X)
⇒ ((∀x:X. (x ∈ A ∈ ℙ)) ∧ SqStable(∀a:A. ∀x:X. (x ≡ a
⇒ (x ∈ A))))
⊢ SqStable(strong-subtype(A;X) ∧ (∀a:A. ∀x:X. (x ≡ a
⇒ (x ∈ A))))
BY
{ (BLemma `sq_stable__and` THEN Try (QuickAuto)) }
1
.....wf.....
1. X : Type
2. d : metric(X)
3. A : Type
4. strong-subtype(A;X)
⇒ ((∀x:X. (x ∈ A ∈ ℙ)) ∧ SqStable(∀a:A. ∀x:X. (x ≡ a
⇒ (x ∈ A))))
⊢ ∀a:A. ∀x:X. (x ≡ a
⇒ (x ∈ A)) ∈ ⋂p:strong-subtype(A;X). ℙ
Latex:
Latex:
1. [X] : Type
2. [d] : metric(X)
3. [A] : Type
4. strong-subtype(A;X) {}\mRightarrow{} ((\mforall{}x:X. (x \mmember{} A \mmember{} \mBbbP{})) \mwedge{} SqStable(\mforall{}a:A. \mforall{}x:X. (x \mequiv{} a {}\mRightarrow{} (x \mmember{} A))))
\mvdash{} SqStable(strong-subtype(A;X) \mwedge{} (\mforall{}a:A. \mforall{}x:X. (x \mequiv{} a {}\mRightarrow{} (x \mmember{} A))))
By
Latex:
(BLemma `sq\_stable\_\_and` THEN Try (QuickAuto))
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