Step
*
1
1
1
of Lemma
geo-colinear-line-eq
1. e : EuclideanPlane
2. a : Point
3. b : Point
4. c : Point
5. l : Line
6. a ≡ fst(l)
7. b ≡ fst(snd(l))
8. m : Line
9. b ≡ fst(m)
10. c ≡ fst(snd(m))
11. Colinear(a;b;c)
12. p : Point
13. Colinear(p;fst(l);fst(snd(l)))
14. p # fst(m)fst(snd(m))
15. Colinear(p;a;b)
16. p # bc
⊢ False
BY
{ ((Thin (14) THEN Thin (13)) THEN (Assert a ≠ b BY ((D 5 THEN D 6) THEN All Reduce THEN Auto))) }
1
1. e : EuclideanPlane
2. a : Point
3. b : Point
4. c : Point
5. l : Line
6. a ≡ fst(l)
7. b ≡ fst(snd(l))
8. m : Line
9. b ≡ fst(m)
10. c ≡ fst(snd(m))
11. Colinear(a;b;c)
12. p : Point
13. Colinear(p;a;b)
14. p # bc
15. a ≠ b
⊢ False
Latex:
Latex:
1. e : EuclideanPlane
2. a : Point
3. b : Point
4. c : Point
5. l : Line
6. a \mequiv{} fst(l)
7. b \mequiv{} fst(snd(l))
8. m : Line
9. b \mequiv{} fst(m)
10. c \mequiv{} fst(snd(m))
11. Colinear(a;b;c)
12. p : Point
13. Colinear(p;fst(l);fst(snd(l)))
14. p \# fst(m)fst(snd(m))
15. Colinear(p;a;b)
16. p \# bc
\mvdash{} False
By
Latex:
((Thin (14) THEN Thin (13)) THEN (Assert a \mneq{} b BY ((D 5 THEN D 6) THEN All Reduce THEN Auto)))
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