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Step * of Lemma isempty_lemma

∀e,eo:Top.  (e ∈b Empty ~ ff)
BY
{ (RepUR ``es-empty-interface in-eclass`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}e,eo:Top.    (e  \mmember{}\msubb{}  Empty  \msim{}  ff)


By

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Latex:
(RepUR  ``es-empty-interface  in-eclass``  0  THEN  Auto)

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