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Step * of Lemma l_subset-l_contains

∀[T:Type]. ∀A,B:T List.  (l_subset(T;A;B) ⇐⇒ A ⊆ B)
BY
{ ((UnivCD THENA Auto) THEN RepUR ``l_contains l_subset`` 0 THEN RWO "l_all_iff<" 0⋅ THEN Auto) }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}A,B:T  List.    (l\_subset(T;A;B)  \mLeftarrow{}{}\mRightarrow{}  A  \msubseteq{}  B)


By

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Latex:
((UnivCD  THENA  Auto)  THEN  RepUR  ``l\_contains  l\_subset``  0  THEN  RWO  "l\_all\_iff<"  0\mcdot{}  THEN  Auto)

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