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Step * of Lemma left-endpoint_wf

∀[I:Interval]. left-endpoint(I) ∈ ℝ supposing i-finite(I)
BY
{ (Unfold `left-endpoint` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[I:Interval].  left-endpoint(I)  \mmember{}  \mBbbR{}  supposing  i-finite(I)


By

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Latex:
(Unfold  `left-endpoint`  0  THEN  Auto)

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