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Step * of Lemma mset_mem_null_lemma

∀x,s:Top.  (x ∈b 0{s} ~ ff)
BY
{ ((UnivCD THENA Auto) THEN RepUR ``mset_mem null_mset`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}x,s:Top.    (x  \mmember{}\msubb{}  0\{s\}  \msim{}  ff)


By

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Latex:
((UnivCD  THENA  Auto)  THEN  RepUR  ``mset\_mem  null\_mset``  0  THEN  Auto)

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