Step
*
1
of Lemma
ex-approx-context
1. e : Atom2
2. a : Base
3. b : Base
4. g : Base
5. e#g:Base
6. ex-approx(e;a;b)
⊢ ex-approx(e;g a;g b)
BY
{ (ParallelLast THEN RepeatFor 2 (D 0 THENA Auto⋅)) }
1
1. e : Atom2
2. a : Base
3. b : Base
4. g : Base
5. e#g:Base
6. ∀f:Base. (e#f:Base
⇒ (f a?e:v.⊥ ≤ f b?e:v.⊥))
7. f : Base
8. e#f:Base
⊢ f (g a)?e:v.⊥ ≤ f (g b)?e:v.⊥
Latex:
Latex:
1. e : Atom2
2. a : Base
3. b : Base
4. g : Base
5. e\#g:Base
6. ex-approx(e;a;b)
\mvdash{} ex-approx(e;g a;g b)
By
Latex:
(ParallelLast THEN RepeatFor 2 (D 0 THENA Auto\mcdot{}))
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