Step
*
2
1
of Lemma
geo-between-middle-or
.....antecedent.....
1. e : BasicGeometry
2. a : Point
3. b : Point
4. c : Point
5. d : Point
6. a ≠ b
7. b ≠ c
8. b ≠ d
9. a_b_d
10. a_c_d
11. c1 : Point
12. a-b-c1
13. bc1 ≅ bc
14. c2 : Point
15. c1-b-c2
16. bc2 ≅ bc
17. c2 ≠ c
18. c_b_d
⊢ d_b_c2
BY
{ ((InstLemma `extended-out-preserves-between` [⌜e⌝;⌜b⌝;⌜c1⌝;⌜d⌝;⌜c2⌝]⋅ THEN Auto)
THEN InstLemma `geo-out-iff-between1` [⌜e⌝;⌜b⌝;⌜c1⌝;⌜d⌝;⌜a⌝]⋅
THEN EAuto 1) }
Latex:
Latex:
.....antecedent.....
1. e : BasicGeometry
2. a : Point
3. b : Point
4. c : Point
5. d : Point
6. a \mneq{} b
7. b \mneq{} c
8. b \mneq{} d
9. a\_b\_d
10. a\_c\_d
11. c1 : Point
12. a-b-c1
13. bc1 \mcong{} bc
14. c2 : Point
15. c1-b-c2
16. bc2 \mcong{} bc
17. c2 \mneq{} c
18. c\_b\_d
\mvdash{} d\_b\_c2
By
Latex:
((InstLemma `extended-out-preserves-between` [\mkleeneopen{}e\mkleeneclose{};\mkleeneopen{}b\mkleeneclose{};\mkleeneopen{}c1\mkleeneclose{};\mkleeneopen{}d\mkleeneclose{};\mkleeneopen{}c2\mkleeneclose{}]\mcdot{} THEN Auto)
THEN InstLemma `geo-out-iff-between1` [\mkleeneopen{}e\mkleeneclose{};\mkleeneopen{}b\mkleeneclose{};\mkleeneopen{}c1\mkleeneclose{};\mkleeneopen{}d\mkleeneclose{};\mkleeneopen{}a\mkleeneclose{}]\mcdot{}
THEN EAuto 1)
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