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Step * of Lemma ravg-weak-between

∀x,y:ℝ.  ((x ≤ y) ⇒ ((x ≤ ravg(x;y)) ∧ (ravg(x;y) ≤ y)))
BY
{ (Auto THEN Unfold `ravg` 0 THEN nRMul ⌜r(2)⌝ 0⋅ THEN Auto) }

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Latex:

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Latex:
\mforall{}x,y:\mBbbR{}.    ((x  \mleq{}  y)  {}\mRightarrow{}  ((x  \mleq{}  ravg(x;y))  \mwedge{}  (ravg(x;y)  \mleq{}  y)))


By

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Latex:
(Auto  THEN  Unfold  `ravg`  0  THEN  nRMul  \mkleeneopen{}r(2)\mkleeneclose{}  0\mcdot{}  THEN  Auto)

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