Step
*
2
of Lemma
p8eu
1. e : EuclideanPlane@i'
2. a : Point@i
3. b : Point@i
4. c : Point@i
5. x : Point@i
6. y : Point@i
7. z : Point@i
8. ¬(a = b ∈ Point)
9. ¬(a = c ∈ Point)
10. ¬(b = c ∈ Point)
11. ¬(x = y ∈ Point)
12. ¬(x = z ∈ Point)
13. ¬(y = z ∈ Point)
14. ab=xy@i
15. bc=yz@i
16. ca=zx@i
17. abc = xyz
⊢ ∃a',c',x',z':Point. (a_b_a' ∧ a_c_c' ∧ x_y_x' ∧ x_z_z' ∧ aa'=xx' ∧ ac'=xz' ∧ a'c'=x'z')
BY
{ (InstConcl [⌜b⌝;⌜c⌝;⌜y⌝;⌜z⌝]⋅ THEN Auto) }
Latex:
Latex:
1. e : EuclideanPlane@i'
2. a : Point@i
3. b : Point@i
4. c : Point@i
5. x : Point@i
6. y : Point@i
7. z : Point@i
8. \mneg{}(a = b)
9. \mneg{}(a = c)
10. \mneg{}(b = c)
11. \mneg{}(x = y)
12. \mneg{}(x = z)
13. \mneg{}(y = z)
14. ab=xy@i
15. bc=yz@i
16. ca=zx@i
17. abc = xyz
\mvdash{} \mexists{}a',c',x',z':Point. (a\_b\_a' \mwedge{} a\_c\_c' \mwedge{} x\_y\_x' \mwedge{} x\_z\_z' \mwedge{} aa'=xx' \mwedge{} ac'=xz' \mwedge{} a'c'=x'z')
By
Latex:
(InstConcl [\mkleeneopen{}b\mkleeneclose{};\mkleeneopen{}c\mkleeneclose{};\mkleeneopen{}y\mkleeneclose{};\mkleeneopen{}z\mkleeneclose{}]\mcdot{} THEN Auto)
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