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Step * of Lemma geo-lt-or2

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∀e:EuclideanPlane. ∀a,b,c,d:Point.  (|ab| < |ac| ⇒ (|ab| < |ad| ∨ |ad| < |ac|))
BY
{ (InstLemma `geo-lt-or` [] THEN ParallelLast' THEN Auto) }

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Latex:

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Latex:
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\mforall{}e:EuclideanPlane.  \mforall{}a,b,c,d:Point.    (|ab|  <  |ac|  {}\mRightarrow{}  (|ab|  <  |ad|  \mvee{}  |ad|  <  |ac|))


By

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Latex:
(InstLemma  `geo-lt-or`  []  THEN  ParallelLast'  THEN  Auto)

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