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Step * of Lemma member-less_than

∀[a,b:ℤ].  Ax ∈ a < b supposing a < b
BY
{ (Auto THEN All (Unfold `less_than`) THEN Auto) }

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Latex:

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Latex:
\mforall{}[a,b:\mBbbZ{}].    Ax  \mmember{}  a  <  b  supposing  a  <  b


By

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Latex:
(Auto  THEN  All  (Unfold  `less\_than`)  THEN  Auto)

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