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Step * of Lemma iseg_member

∀[T:Type]. ∀l1,l2:T List. ∀x:T.  (l1 ≤ l2 ⇒ (x ∈ l1) ⇒ (x ∈ l2))
BY
{ (Auto THEN FLemma `iseg_implies_member` [-2] THEN Auto) }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}l1,l2:T  List.  \mforall{}x:T.    (l1  \mleq{}  l2  {}\mRightarrow{}  (x  \mmember{}  l1)  {}\mRightarrow{}  (x  \mmember{}  l2))


By

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Latex:
(Auto  THEN  FLemma  `iseg\_implies\_member`  [-2]  THEN  Auto)

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