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Step * of Lemma bag-combine-empty-left

∀[f:Top]. (⋃x∈{}.f[x] ~ {})
BY
{ (Auto THEN RepUR ``bag-combine bag-map bag-union concat empty-bag`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[f:Top].  (\mcup{}x\mmember{}\{\}.f[x]  \msim{}  \{\})


By

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Latex:
(Auto  THEN  RepUR  ``bag-combine  bag-map  bag-union  concat  empty-bag``  0  THEN  Auto)

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