Step * of Lemma bag-summation-empty

[add,zero,f:Top].  (x∈{}). f[x] zero)
BY
(RepUR ``bag-summation bag-accum empty-bag`` THEN Auto) }


Latex:


Latex:
\mforall{}[add,zero,f:Top].    (\mSigma{}(x\mmember{}\{\}).  f[x]  \msim{}  zero)


By


Latex:
(RepUR  ``bag-summation  bag-accum  empty-bag``  0  THEN  Auto)




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