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Step * 1 of Lemma count_append


1. s : DSet
2. bs : |s| List
3. c : |s|
⊢ (c #∈ bs) = (0 + (c #∈ bs)) ∈ ℤ
BY
{ Auto }

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Latex:

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Latex:

1.  s  :  DSet
2.  bs  :  |s|  List
3.  c  :  |s|
\mvdash{}  (c  \#\mmember{}  bs)  =  (0  +  (c  \#\mmember{}  bs))


By

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Latex:
Auto

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