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Step * 2 2 of Lemma r2-perp_wf


1. x : ℝ^2
2. r0 < ||x||
3. r2-perp(x) ∈ ℝ^2
4. x⋅r2-perp(x) = r0
5. r2-perp(x)⋅r2-perp(x) = r1
⊢ rsqrt(r2-perp(x)⋅r2-perp(x)) = r1
BY
{ (RWO  "-1" 0 THEN Auto) }

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Latex:

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Latex:

1.  x  :  \mBbbR{}\^{}2
2.  r0  <  ||x||
3.  r2-perp(x)  \mmember{}  \mBbbR{}\^{}2
4.  x\mcdot{}r2-perp(x)  =  r0
5.  r2-perp(x)\mcdot{}r2-perp(x)  =  r1
\mvdash{}  rsqrt(r2-perp(x)\mcdot{}r2-perp(x))  =  r1


By

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Latex:
(RWO    "-1"  0  THEN  Auto)

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