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Step * 1 1 of Lemma bag-append-union


1. T : Type
2. bs : bag(bag(T))
⊢ bag-union(bs) = bag-union(bs) ∈ bag(T)
BY
{ Auto }

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Latex:

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Latex:

1.  T  :  Type
2.  bs  :  bag(bag(T))
\mvdash{}  bag-union(bs)  =  bag-union(bs)


By

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Latex:
Auto

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