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Step * of Lemma vs-bag-add-map

∀[vs:Top]. ∀[S:Type]. ∀[f,g:Top]. ∀[bs:bag(S)].  (Σ{f[b] | b ∈ bag-map(g;bs)} ~ Σ{f[g b] | b ∈ bs})
BY
{ (Intros THEN RepUR ``vs-bag-add`` 0 THEN RWO "bag-summation-map" 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[vs:Top].  \mforall{}[S:Type].  \mforall{}[f,g:Top].  \mforall{}[bs:bag(S)].    (\mSigma{}\{f[b]  |  b  \mmember{}  bag-map(g;bs)\}  \msim{}  \mSigma{}\{f[g  b]  |  b  \mmember{}  bs\})


By

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Latex:
(Intros  THEN  RepUR  ``vs-bag-add``  0  THEN  RWO  "bag-summation-map"  0  THEN  Auto)

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