Step * of Lemma bag-no-repeats-cons

[T:Type]. ∀[b:bag(T)]. ∀[x:T].  uiff(bag-no-repeats(T;x.b);bag-no-repeats(T;b) ∧ x ↓∈ b))
BY
((UnivCD THENA Auto) THEN (Subst ⌜x.b x.{} b⌝ 0⋅ THENA (RepUR ``cons-bag empty-bag bag-append`` THEN Auto))) }

1
1. Type
2. bag(T)
3. T
⊢ uiff(bag-no-repeats(T;x.{} b);bag-no-repeats(T;b) ∧ x ↓∈ b))


Latex:


Latex:
\mforall{}[T:Type].  \mforall{}[b:bag(T)].  \mforall{}[x:T].    uiff(bag-no-repeats(T;x.b);bag-no-repeats(T;b)  \mwedge{}  (\mneg{}x  \mdownarrow{}\mmember{}  b))


By


Latex:
((UnivCD  THENA  Auto)
  THEN  (Subst  \mkleeneopen{}x.b  \msim{}  x.\{\}  +  b\mkleeneclose{}  0\mcdot{}  THENA  (RepUR  ``cons-bag  empty-bag  bag-append``  0  THEN  Auto))
  )




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