Step
*
1
2
of Lemma
geo-tar-same-side-iff
1. e : BasicGeometry
2. A : Point
3. B : Point
4. P : Point
5. Q : Point
6. c : Point
7. P # AB
8. c # AB
9. t1 : Point
10. Colinear(A;B;t1)
11. B(Pt1c)
12. Q # AB
13. c # AB
14. t : Point
15. Colinear(A;B;t)
16. B(Qtc)
17. P # AB
18. Q # AB
19. Q leftof AB
⊢ P leftof AB
BY
{ (Thin (-2)
THEN D -2
THEN Try (Trivial)
THEN (All (RWO "not-lsep-iff-colinear<") THENA Auto)
THEN D 8
THEN Try (((Assert t1 leftof BA BY EasyGeometry) THEN D 10 THEN Auto))) }
1
1. e : BasicGeometry
2. A : Point
3. B : Point
4. P : Point
5. Q : Point
6. c : Point
7. P # AB
8. c leftof AB
9. t1 : Point
10. ¬A # Bt1
11. B(Pt1c)
12. Q # AB
13. c # AB
14. t : Point
15. ¬A # Bt
16. B(Qtc)
17. P leftof BA
18. Q leftof AB
⊢ P leftof AB
Latex:
Latex:
1. e : BasicGeometry
2. A : Point
3. B : Point
4. P : Point
5. Q : Point
6. c : Point
7. P \# AB
8. c \# AB
9. t1 : Point
10. Colinear(A;B;t1)
11. B(Pt1c)
12. Q \# AB
13. c \# AB
14. t : Point
15. Colinear(A;B;t)
16. B(Qtc)
17. P \# AB
18. Q \# AB
19. Q leftof AB
\mvdash{} P leftof AB
By
Latex:
(Thin (-2)
THEN D -2
THEN Try (Trivial)
THEN (All (RWO "not-lsep-iff-colinear<") THENA Auto)
THEN D 8
THEN Try (((Assert t1 leftof BA BY EasyGeometry) THEN D 10 THEN Auto)))
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