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Step * 2 of Lemma zhgrp_to_nat_is_hom


nat(e) = 0 ∈ ℕ
BY
{ ((RWH zhgrp_to_nat_downC 0 ) THEN Auto) }

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Latex:

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Latex:

nat(e)  =  0


By

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Latex:
((RWH  zhgrp\_to\_nat\_downC  0  )  THEN  Auto)

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