Step
*
1
1
1
of Lemma
eu-between-eq-implies-colinear3
1. e : EuclideanPlane@i'
2. a : Point
3. b : Point
4. c : Point
5. ¬(a = b ∈ Point)
6. b-c-a@i
7. ¬(a = b ∈ Point)
8. (¬(c = a ∈ Point)) ∧ (¬(c = b ∈ Point)) ∧ (¬c-a-b) ∧ (¬a-c-b) ∧ (¬a-b-c)@i
⊢ False
BY
{ ExRepD }
1
1. e : EuclideanPlane@i'
2. a : Point
3. b : Point
4. c : Point
5. ¬(a = b ∈ Point)
6. b-c-a@i
7. ¬(a = b ∈ Point)
8. ¬(c = a ∈ Point)@i
9. ¬(c = b ∈ Point)@i
10. ¬c-a-b@i
11. ¬a-c-b@i
12. ¬a-b-c@i
⊢ False
Latex:
Latex:
1. e : EuclideanPlane@i'
2. a : Point
3. b : Point
4. c : Point
5. \mneg{}(a = b)
6. b-c-a@i
7. \mneg{}(a = b)
8. (\mneg{}(c = a)) \mwedge{} (\mneg{}(c = b)) \mwedge{} (\mneg{}c-a-b) \mwedge{} (\mneg{}a-c-b) \mwedge{} (\mneg{}a-b-c)@i
\mvdash{} False
By
Latex:
ExRepD
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