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Step * of Lemma rank-zero

pi-rank(pizero()) = 0 ∈ ℕ
BY
{ (RepUR ``pi-rank`` 0 THEN Auto) }

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Latex:

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Latex:
pi-rank(pizero())  =  0


By

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Latex:
(RepUR  ``pi-rank``  0  THEN  Auto)

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