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Step * of Lemma rat-interval-intersection_wf

∀[I,J:ℚInterval].  (I ⋂ J ∈ ℚInterval)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[I,J:\mBbbQ{}Interval].    (I  \mcap{}  J  \mmember{}  \mBbbQ{}Interval)


By

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Latex:
ProveWfLemma

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