Step * 1 2 1 2 of Lemma FormSafe-iff-FormSafe1'


1. Type
2. left Form(C)
3. right Form(C)
4. vs Atom List
5. theta Atom List
6. l_subset(Atom;theta;vs-FormFvs(right))
7. FormSafe1(left) theta
8. FormSafe1(right) vs-theta
9. set-equal(Atom;vs;theta vs-theta)
10. FormSafe1(left) theta
11. FormSafe1(right) vs-theta
⊢ l_disjoint(Atom;theta;FormFvs(right)) ∨ l_disjoint(Atom;vs-theta;FormFvs(left))
BY
((OrLeft THEN Auto) THEN RepeatFor ((D THENA Auto))) }

1
1. Type
2. left Form(C)
3. right Form(C)
4. vs Atom List
5. theta Atom List
6. l_subset(Atom;theta;vs-FormFvs(right))
7. FormSafe1(left) theta
8. FormSafe1(right) vs-theta
9. set-equal(Atom;vs;theta vs-theta)
10. FormSafe1(left) theta
11. FormSafe1(right) vs-theta
12. Atom
13. (x ∈ theta) ∧ (x ∈ FormFvs(right))
⊢ False


Latex:


Latex:

1.  C  :  Type
2.  left  :  Form(C)
3.  right  :  Form(C)
4.  vs  :  Atom  List
5.  theta  :  Atom  List
6.  l\_subset(Atom;theta;vs-FormFvs(right))
7.  FormSafe1(left)  theta
8.  FormSafe1(right)  vs-theta
9.  set-equal(Atom;vs;theta  @  vs-theta)
10.  FormSafe1(left)  theta
11.  FormSafe1(right)  vs-theta
\mvdash{}  l\_disjoint(Atom;theta;FormFvs(right))  \mvee{}  l\_disjoint(Atom;vs-theta;FormFvs(left))


By


Latex:
((OrLeft  THEN  Auto)  THEN  RepeatFor  2  ((D  0  THENA  Auto)))




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