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Step * 1 1 1 of Lemma p_first_nil_lemma


1. x : Top@i
⊢ ff ~ ff
BY
{ Try SqEqCD }

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Latex:

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Latex:

1.  x  :  Top@i
\mvdash{}  ff  \msim{}  ff


By

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Latex:
Try  SqEqCD

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