Step * of Lemma eu-be-end-eq

e:EuclideanPlane. ∀a,b,c:Point.  (a_b_c  ab=ac  (b c ∈ Point))
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1
1. EuclideanPlane@i'
2. Point@i
3. Point@i
4. Point@i
5. a_b_c@i
6. ab=ac@i
⊢ c ∈ Point


Latex:


Latex:
\mforall{}e:EuclideanPlane.  \mforall{}a,b,c:Point.    (a\_b\_c  {}\mRightarrow{}  ab=ac  {}\mRightarrow{}  (b  =  c))


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Latex:
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