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Step * of Lemma rminus-neq-zero

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∀x:ℝ. (x ≠ r0 ⇒ -(x) ≠ r0)
BY
{ (RWO "rminus-as-rmul" 0 THEN Auto) }

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Latex:

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Latex:
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\mforall{}x:\mBbbR{}.  (x  \mneq{}  r0  {}\mRightarrow{}  -(x)  \mneq{}  r0)


By

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Latex:
(RWO  "rminus-as-rmul"  0  THEN  Auto)

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