Step
*
2
1
of Lemma
geo-intersect-lines
1. e : EuclideanPlane
2. p : Line
3. l : Line
4. a : Point
5. b : Point
6. Colinear(a;fst(p);fst(snd(p)))
7. Colinear(b;fst(p);fst(snd(p)))
8. a leftof fst(l)fst(snd(l))
9. b leftof fst(snd(l))fst(l)
⊢ p \/ l
BY
{ ((D 0 With ⌜p⌝ THENA Auto) THEN D 0 With ⌜l⌝ THEN Auto) }
1
1. e : EuclideanPlane
2. p : Line
3. l : Line
4. a : Point
5. b : Point
6. Colinear(a;fst(p);fst(snd(p)))
7. Colinear(b;fst(p);fst(snd(p)))
8. a leftof fst(l)fst(snd(l))
9. b leftof fst(snd(l))fst(l)
10. p = p ∈ LINE
11. l = l ∈ LINE
⊢ ∃a,b:{c:Point| c I p} . (a leftof fst(l)fst(snd(l)) ∧ b leftof fst(snd(l))fst(l))
Latex:
Latex:
1. e : EuclideanPlane
2. p : Line
3. l : Line
4. a : Point
5. b : Point
6. Colinear(a;fst(p);fst(snd(p)))
7. Colinear(b;fst(p);fst(snd(p)))
8. a leftof fst(l)fst(snd(l))
9. b leftof fst(snd(l))fst(l)
\mvdash{} p \mbackslash{}/ l
By
Latex:
((D 0 With \mkleeneopen{}p\mkleeneclose{} THENA Auto) THEN D 0 With \mkleeneopen{}l\mkleeneclose{} THEN Auto)
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