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Step * of Lemma eu-length-null-segment

∀[e:EuclideanPlane]. ∀[a:Point].  (|aa| = X ∈ {p:Point| O_X_p} )
BY
{ (Auto
   THEN RepUR ``eu-length`` 0
   THEN GeneralizeEuExtends [`b']⋅
   THEN InstLemma `eu-construction-unicity` [⌜e⌝;⌜O⌝;⌜X⌝;⌜b⌝;⌜X⌝]⋅
   THEN Auto) }

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Latex:

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Latex:
\mforall{}[e:EuclideanPlane].  \mforall{}[a:Point].    (|aa|  =  X)


By

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Latex:
(Auto
  THEN  RepUR  ``eu-length``  0
  THEN  GeneralizeEuExtends  [`b']\mcdot{}
  THEN  InstLemma  `eu-construction-unicity`  [\mkleeneopen{}e\mkleeneclose{};\mkleeneopen{}O\mkleeneclose{};\mkleeneopen{}X\mkleeneclose{};\mkleeneopen{}b\mkleeneclose{};\mkleeneopen{}X\mkleeneclose{}]\mcdot{}
  THEN  Auto)

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