Step
*
1
1
1
1
of Lemma
eu-be-end-eq
.....assertion.....
1. e : EuclideanPlane@i'
2. a : Point@i
3. b : Point@i
4. c : Point@i
5. a_b_c@i
6. ab=ac@i
7. |ac| = |ab| + |bc| ∈ {p:Point| O_X_p}
8. |ac| = |ac| + |bc| ∈ {p:Point| O_X_p}
9. |ab| = |ac| ∈ {p:Point| O_X_p}
10. ab=ac
⊢ |ac| + X = |ac| + |bc| ∈ {p:Point| O_X_p}
BY
{ InstLemma `eu-add-length-zero` [⌜e⌝;⌜|ac|⌝]⋅
THEN Auto }
Latex:
Latex:
.....assertion.....
1. e : EuclideanPlane@i'
2. a : Point@i
3. b : Point@i
4. c : Point@i
5. a\_b\_c@i
6. ab=ac@i
7. |ac| = |ab| + |bc|
8. |ac| = |ac| + |bc|
9. |ab| = |ac|
10. ab=ac
\mvdash{} |ac| + X = |ac| + |bc|
By
Latex:
InstLemma `eu-add-length-zero` [\mkleeneopen{}e\mkleeneclose{};\mkleeneopen{}|ac|\mkleeneclose{}]\mcdot{}
THEN Auto
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