Step
*
of Lemma
count_append
∀s:DSet. ∀as,bs:|s| List. ∀c:|s|. ((c #∈ (as @ bs)) = ((c #∈ as) + (c #∈ bs)) ∈ ℤ)
BY
{ (((UnivCD THENA Auto) THEN OnVar `as' ListInd) THEN AbReduce 0) }
1
1. s : DSet
2. bs : |s| List
3. c : |s|
⊢ (c #∈ bs) = (0 + (c #∈ bs)) ∈ ℤ
2
1. s : DSet
2. bs : |s| List
3. c : |s|
4. u : |s|
5. v : |s| List
6. (c #∈ (v @ bs)) = ((c #∈ v) + (c #∈ bs)) ∈ ℤ
⊢ (b2i(u (=b) c) + (c #∈ (v @ bs))) = ((b2i(u (=b) c) + (c #∈ v)) + (c #∈ bs)) ∈ ℤ
Latex:
Latex:
\mforall{}s:DSet. \mforall{}as,bs:|s| List. \mforall{}c:|s|. ((c \#\mmember{} (as @ bs)) = ((c \#\mmember{} as) + (c \#\mmember{} bs)))
By
Latex:
(((UnivCD THENA Auto) THEN OnVar `as' ListInd) THEN AbReduce 0)
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