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Step * 2 of Lemma geo-le-zero


1. e : BasicGeometry
2. p : Length
3. 0 = |XX| ∈ Length
⊢ uiff(p ≤ 0;p = 0 ∈ Length)
BY
{ (RWO  "-1" 0 THENA Auto) }

1
1. e : BasicGeometry
2. p : Length
3. 0 = |XX| ∈ Length
⊢ uiff(p ≤ |XX|;p = |XX| ∈ Length)

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Latex:

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Latex:

1.  e  :  BasicGeometry
2.  p  :  Length
3.  0  =  |XX|
\mvdash{}  uiff(p  \mleq{}  0;p  =  0)


By

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Latex:
(RWO    "-1"  0  THENA  Auto)

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