Step
*
1
1
1
1
1
1
1
1
of Lemma
geo-out-preserves-opp-side-case1
1. e : BasicGeometry
2. p : Point
3. q : Point
4. a : Point
5. b : Point
6. c : Point
7. r : Point
8. m : Point
9. p ≠ q
10. a-pq-c
11. Colinear(p;q;m)
12. a=m=c
13. Colinear(p;q;r)
14. r_b_a
15. r ≠ b
16. a ≠ b
17. r-b-a
18. c-m-a
19. x : Point
20. b_x_c
21. m_x_r
22. ∀T:Point. (b_T_c
⇒ (¬Colinear(p;q;T)))
⊢ Colinear(p;q;x)
BY
{ (gSeparatedCases' ⌜r⌝ ⌜m⌝⋅ THEN Auto) }
Latex:
Latex:
1. e : BasicGeometry
2. p : Point
3. q : Point
4. a : Point
5. b : Point
6. c : Point
7. r : Point
8. m : Point
9. p \mneq{} q
10. a-pq-c
11. Colinear(p;q;m)
12. a=m=c
13. Colinear(p;q;r)
14. r\_b\_a
15. r \mneq{} b
16. a \mneq{} b
17. r-b-a
18. c-m-a
19. x : Point
20. b\_x\_c
21. m\_x\_r
22. \mforall{}T:Point. (b\_T\_c {}\mRightarrow{} (\mneg{}Colinear(p;q;T)))
\mvdash{} Colinear(p;q;x)
By
Latex:
(gSeparatedCases' \mkleeneopen{}r\mkleeneclose{} \mkleeneopen{}m\mkleeneclose{}\mcdot{} THEN Auto)
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