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Step * of Lemma rat-sub-interval_wf

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∀[I,J:ℚInterval].  (rat-sub-interval(I;J) ∈ ℙ)
BY
{ ProveWfLemma }

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Latex:

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Latex:
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\mforall{}[I,J:\mBbbQ{}Interval].    (rat-sub-interval(I;J)  \mmember{}  \mBbbP{})


By

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Latex:
ProveWfLemma

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