Step
*
1
of Lemma
geo-left-out-3
.....assertion.....
1. e : EuclideanPlane
2. a : Point
3. b : Point
4. p : Point
5. p' : Point
6. p leftof ba
7. out(a pp')
8. p # ba
9. p' leftof ab
⊢ False
BY
{ RepeatFor 3 (D -3) }
1
1. e : EuclideanPlane
2. a : Point
3. b : Point
4. p : Point
5. p' : Point
6. p leftof ba
7. a ≠ p
8. a ≠ p'
9. p # ba
10. p' leftof ab
⊢ (¬a_p_p') ∧ (¬a_p'_p)
Latex:
Latex:
.....assertion.....
1. e : EuclideanPlane
2. a : Point
3. b : Point
4. p : Point
5. p' : Point
6. p leftof ba
7. out(a pp')
8. p \# ba
9. p' leftof ab
\mvdash{} False
By
Latex:
RepeatFor 3 (D -3)
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