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Step * 1 1 of Lemma add_grp_of_rng_wf_b


1. r : Rng
⊢ r↓+gp ∈ Group{i}
BY
{ BackThruLemma `add_grp_of_rng_wf_a` 
THEN Auto }

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Latex:

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Latex:

1.  r  :  Rng
\mvdash{}  r\mdownarrow{}+gp  \mmember{}  Group\{i\}


By

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Latex:
BackThruLemma  `add\_grp\_of\_rng\_wf\_a` 
THEN  Auto

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