Step
*
of Lemma
ss-mem-basic-and
No Annotations
∀[X:SeparationSpace]. ∀u,v:ss-basic(X). ∀x:Point(X). uiff(x ∈ ss-basic-and(u;v);x ∈ u ∧ x ∈ v)
BY
{ (Auto THEN (Unhide THENA Auto) THEN All (RepUR ``ss-mem-basic ss-basic l_all ss-basic-and``)) }
1
1. X : SeparationSpace
2. u : (Point(X ⟶ ℝ) × ℝ) List
3. v : (Point(X ⟶ ℝ) × ℝ) List
4. x : Point(X)
5. ∀i:ℕ||u @ v||. let f,r = u @ v[i] in f(x) < r
⊢ ∀i:ℕ||u||. let f,r = u[i] in f(x) < r
2
1. X : SeparationSpace
2. u : (Point(X ⟶ ℝ) × ℝ) List
3. v : (Point(X ⟶ ℝ) × ℝ) List
4. x : Point(X)
5. ∀i:ℕ||u @ v||. let f,r = u @ v[i] in f(x) < r
⊢ ∀i:ℕ||v||. let f,r = v[i] in f(x) < r
3
1. X : SeparationSpace
2. u : (Point(X ⟶ ℝ) × ℝ) List
3. v : (Point(X ⟶ ℝ) × ℝ) List
4. x : Point(X)
5. (∀i:ℕ||u||. let f,r = u[i] in f(x) < r) ∧ (∀i:ℕ||v||. let f,r = v[i] in f(x) < r)
⊢ ∀i:ℕ||u @ v||. let f,r = u @ v[i] in f(x) < r
Latex:
Latex:
No Annotations
\mforall{}[X:SeparationSpace]. \mforall{}u,v:ss-basic(X). \mforall{}x:Point(X). uiff(x \mmember{} ss-basic-and(u;v);x \mmember{} u \mwedge{} x \mmember{} v)
By
Latex:
(Auto THEN (Unhide THENA Auto) THEN All (RepUR ``ss-mem-basic ss-basic l\_all ss-basic-and``))
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