Nuprl Lemma : rng_when_thru_plus 6,26

r:Rng, b:pq:|r|. (when b. (p +r q)) = ((when bp) +r (when bq))  |r
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Definitionsx:AB(x), x f y, IMonoid, t  T, |g|, *, r+gp, AbGrp, Group{i}, Mon, P & Q, Prop, 1of(t), 2of(t), when bp
Lemmasmon when thru op, add grp of rng wf b, monoid p wf, grp car wf, grp op wf, grp id wf, abgrp wf, rng wf

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