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Step * of Lemma rabs-rleq

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∀x,z:ℝ.  (|x| ≤ z ⇐⇒ (-(z) ≤ x) ∧ (x ≤ z))
BY
{ (RWO "rabs-as-rmax" 0 THEN Auto THEN All (RWO "rmax_lb<")⋅ THEN Auto) }

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Latex:

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Latex:
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\mforall{}x,z:\mBbbR{}.    (|x|  \mleq{}  z  \mLeftarrow{}{}\mRightarrow{}  (-(z)  \mleq{}  x)  \mwedge{}  (x  \mleq{}  z))


By

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Latex:
(RWO  "rabs-as-rmax"  0  THEN  Auto  THEN  All  (RWO  "rmax\_lb<")\mcdot{}  THEN  Auto)

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