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Step * of Lemma cons-bag-as-append

∀[x,b:Top].  (x.b ~ {x} + b)
BY
{ (RepUR ``cons-bag single-bag bag-append`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[x,b:Top].    (x.b  \msim{}  \{x\}  +  b)


By

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Latex:
(RepUR  ``cons-bag  single-bag  bag-append``  0  THEN  Auto)

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