Step * of Lemma add_grp_of_rng_wf_b

[r:Rng]. (r↓+gp ∈ AbGrp)
BY
((D 0) THENA Auto) }

1
1. Rng
⊢ r↓+gp ∈ AbGrp


Latex:


Latex:
\mforall{}[r:Rng].  (r\mdownarrow{}+gp  \mmember{}  AbGrp)


By


Latex:
((D  0)  THENA  Auto)




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