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Step * of Lemma int-bag-sum_wf

∀[b:bag(ℤ)]. (Σ(b) ∈ ℤ)
BY
{ (ProveWfLemma THEN D 0 THEN Reduce 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[b:bag(\mBbbZ{})].  (\mSigma{}(b)  \mmember{}  \mBbbZ{})


By

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Latex:
(ProveWfLemma  THEN  D  0  THEN  Reduce  0  THEN  Auto)

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