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Step * of Lemma rmul_wf

∀[a,b:ℝ].  (a * b ∈ ℝ)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[a,b:\mBbbR{}].    (a  *  b  \mmember{}  \mBbbR{})


By

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Latex:
ProveWfLemma

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