Step * of Lemma geo-colinear-iff

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e:BasicGeometry-. ∀a,b,c:Point.  (Colinear(a;b;c) ⇐⇒ ¬((¬B(abc)) ∧ B(bca)) ∧ B(cab))))
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1
1. BasicGeometry-
2. Point
3. Point
4. Point
5. Colinear(a;b;c)
⊢ ¬((¬B(abc)) ∧ B(bca)) ∧ B(cab)))

2
1. BasicGeometry-
2. Point
3. Point
4. Point
5. ¬((¬B(abc)) ∧ B(bca)) ∧ B(cab)))
⊢ Colinear(a;b;c)


Latex:


Latex:
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\mforall{}e:BasicGeometry-.  \mforall{}a,b,c:Point.    (Colinear(a;b;c)  \mLeftarrow{}{}\mRightarrow{}  \mneg{}((\mneg{}B(abc))  \mwedge{}  (\mneg{}B(bca))  \mwedge{}  (\mneg{}B(cab))))


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Latex:
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