Step * of Lemma geo-zero-point-sep-iff-sep

e:BasicGeometry. ∀a,b:Point.  (X ≠ |ab| ⇐⇒ a ≠ b)
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1
1. BasicGeometry
2. Point
3. Point
4. X ≠ |ab|
⊢ a ≠ b

2
1. BasicGeometry
2. Point
3. Point
4. a ≠ b
⊢ X ≠ |ab|


Latex:


Latex:
\mforall{}e:BasicGeometry.  \mforall{}a,b:Point.    (X  \mneq{}  |ab|  \mLeftarrow{}{}\mRightarrow{}  a  \mneq{}  b)


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Latex:
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