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Step * of Lemma cdrng_wf

CDRng ∈ 𝕌'
BY
{ (Unfold `cdrng` 0 THEN Auto⋅ THEN D (-1) THEN Auto) }

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Latex:

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Latex:
CDRng  \mmember{}  \mBbbU{}'


By

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Latex:
(Unfold  `cdrng`  0  THEN  Auto\mcdot{}  THEN  D  (-1)  THEN  Auto)

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