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Step * of Lemma real-vec-dist_wf

∀[n:ℕ]. ∀[x,y:ℝ^n].  (d(x;y) ∈ {d:ℝ| r0 ≤ d} )
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[n:\mBbbN{}].  \mforall{}[x,y:\mBbbR{}\^{}n].    (d(x;y)  \mmember{}  \{d:\mBbbR{}|  r0  \mleq{}  d\}  )


By

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Latex:
ProveWfLemma

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