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Step * of Lemma rmin-rmax-subinterval

∀I:Interval. ∀a,b:ℝ.  ((a ∈ I) ⇒ (b ∈ I) ⇒ [rmin(a;b), rmax(a;b)] ⊆ I )
BY
{ (Auto THEN BLemma `rcc-subinterval` THEN EAuto 1) }

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Latex:

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Latex:
\mforall{}I:Interval.  \mforall{}a,b:\mBbbR{}.    ((a  \mmember{}  I)  {}\mRightarrow{}  (b  \mmember{}  I)  {}\mRightarrow{}  [rmin(a;b),  rmax(a;b)]  \msubseteq{}  I  )


By

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Latex:
(Auto  THEN  BLemma  `rcc-subinterval`  THEN  EAuto  1)

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