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Step * of Lemma bag-val-empty

∀[+,zero:Top].  (bag-val(zero;+) {} ~ zero)
BY
{ (RepUR ``bag-val empty-bag`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[+,zero:Top].    (bag-val(zero;+)  \{\}  \msim{}  zero)


By

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

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