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Step * 1 1 1 of Lemma lsum_nil_lemma


1. f : Top
⊢ 0 ~ 0
BY
{ Try SqEqCD }

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Latex:

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Latex:

1.  f  :  Top
\mvdash{}  0  \msim{}  0


By

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Latex:
Try  SqEqCD

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