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Step * of Lemma deq-fset-member_wf

∀[T:Type]. ∀[eq:EqDecider(T)]. ∀[a:T]. ∀[s:fset(T)].  (a ∈b s ∈ 𝔹)
BY
{ (Auto
   THEN Unfold `deq-fset-member` 0
   THEN (D -1 THEN Auto)
   THEN (BLemma `iff_imp_equal_bool`  THENA Auto)
   THEN (RW assert_pushdownC 0 THENA Auto)) }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}[eq:EqDecider(T)].  \mforall{}[a:T].  \mforall{}[s:fset(T)].    (a  \mmember{}\msubb{}  s  \mmember{}  \mBbbB{})


By

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Latex:
(Auto
  THEN  Unfold  `deq-fset-member`  0
  THEN  (D  -1  THEN  Auto)
  THEN  (BLemma  `iff\_imp\_equal\_bool`    THENA  Auto)
  THEN  (RW  assert\_pushdownC  0  THENA  Auto))

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