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Step * of Lemma nim_sum0_lemma

∀y:Top. (nim-sum(0;y) ~ y)
BY
{ (UnivCD THENA Auto) }

1
1. y : Top
⊢ nim-sum(0;y) ~ y

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Latex:

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Latex:
\mforall{}y:Top.  (nim-sum(0;y)  \msim{}  y)


By

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Latex:
(UnivCD  THENA  Auto)

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