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Step * of Lemma interval-retraction_wf

∀[u,v,x:ℝ].  interval-retraction(u;v;x) ∈ {x:ℝ| x ∈ [u, v]}  supposing u ≤ v
BY
{ (ProveWfLemma THEN MemTypeCD THEN Auto THEN BLemma `rmin_ub` THEN Auto) }

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Latex:

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Latex:
\mforall{}[u,v,x:\mBbbR{}].    interval-retraction(u;v;x)  \mmember{}  \{x:\mBbbR{}|  x  \mmember{}  [u,  v]\}    supposing  u  \mleq{}  v


By

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Latex:
(ProveWfLemma  THEN  MemTypeCD  THEN  Auto  THEN  BLemma  `rmin\_ub`  THEN  Auto)

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