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Step * of Lemma subinterval_transitivity

∀[I,J,K:Interval].  (I ⊆ J  ⇒ J ⊆ K  ⇒ I ⊆ K )
BY
{ (Unfold `subinterval` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[I,J,K:Interval].    (I  \msubseteq{}  J    {}\mRightarrow{}  J  \msubseteq{}  K    {}\mRightarrow{}  I  \msubseteq{}  K  )


By

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Latex:
(Unfold  `subinterval`  0  THEN  Auto)

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