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Step * of Lemma rminus-reverses-rleq

∀[x,y:ℝ].  -(y) ≤ -(x) supposing x ≤ y
BY
{ (Unfold `rleq` 0 THEN Auto) }

1
1. x : ℝ
2. y : ℝ
3. rnonneg(y - x)
⊢ rnonneg(-(x) - -(y))

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Latex:

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Latex:
\mforall{}[x,y:\mBbbR{}].    -(y)  \mleq{}  -(x)  supposing  x  \mleq{}  y


By

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Latex:
(Unfold  `rleq`  0  THEN  Auto)

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