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Step * of Lemma closed-rational-interval_wf

∀[a:ℤ]. ∀[b:ℤ-o]. ∀[c:ℤ]. ∀[d:ℤ-o].  (closed-rational-interval(a;b;c;d) ∈ Interval)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[a:\mBbbZ{}].  \mforall{}[b:\mBbbZ{}\msupminus{}\msupzero{}].  \mforall{}[c:\mBbbZ{}].  \mforall{}[d:\mBbbZ{}\msupminus{}\msupzero{}].    (closed-rational-interval(a;b;c;d)  \mmember{}  Interval)


By

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Latex:
ProveWfLemma

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