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Step * of Lemma qavg_wf

∀[a,b:ℚ].  (qavg(a;b) ∈ ℚ)
BY
{ (Unfold `qavg` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[a,b:\mBbbQ{}].    (qavg(a;b)  \mmember{}  \mBbbQ{})


By

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Latex:
(Unfold  `qavg`  0  THEN  Auto)

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