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Step * of Lemma rbetween_wf

∀[x,y,z:ℝ].  (x≤y≤z ∈ ℙ)
BY
{ (Unfold `rbetween` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[x,y,z:\mBbbR{}].    (x\mleq{}y\mleq{}z  \mmember{}  \mBbbP{})


By

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Latex:
(Unfold  `rbetween`  0  THEN  Auto)

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