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Step * of Lemma bag-mapfilter-empty

∀P,f:Top.  (bag-mapfilter(f;P;{}) ~ {})
BY
{ (Auto THEN RepUR ``bag-mapfilter bag-filter empty-bag bag-map`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}P,f:Top.    (bag-mapfilter(f;P;\{\})  \msim{}  \{\})


By

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Latex:
(Auto  THEN  RepUR  ``bag-mapfilter  bag-filter  empty-bag  bag-map``  0  THEN  Auto)

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