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Step * of Lemma rmul*_wf

∀[x,y:ℝ*].  (x * y ∈ ℝ*)
BY
{ ProveWfLemma }

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Latex:

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


By

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Latex:
ProveWfLemma

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