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Step * 1 1 of Lemma arctangent-reduction-1

.....set predicate..... 
1. x : ℝ
2. r(-1) < x
⊢ (r(-1)/r1) < x
BY
{ (nRNorm 0 THEN Auto) }

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Latex:

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Latex:
.....set  predicate..... 
1.  x  :  \mBbbR{}
2.  r(-1)  <  x
\mvdash{}  (r(-1)/r1)  <  x


By

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Latex:
(nRNorm  0  THEN  Auto)

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