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Step * of Lemma eu-between_wf

∀[e:EuclideanStructure]. ∀[a,b,c:Point].  (a-b-c ∈ ℙ)
BY
{ (ProveWfLemma THEN All (Unfold `eu-point`)⋅ THEN DRecord 1 THEN Auto) }

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Latex:

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Latex:
\mforall{}[e:EuclideanStructure].  \mforall{}[a,b,c:Point].    (a-b-c  \mmember{}  \mBbbP{})


By

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Latex:
(ProveWfLemma  THEN  All  (Unfold  `eu-point`)\mcdot{}  THEN  DRecord  1  THEN  Auto)

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