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Step * of Lemma crng_times_comm

∀[r:CRng]. ∀[a,b:|r|].  ((a * b) = (b * a) ∈ |r|)
BY
{ ProveSpecializedLemma `abmonoid_comm` 1 [parm{i};r↓xmn] (AbReduceC) }

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Latex:

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Latex:
\mforall{}[r:CRng].  \mforall{}[a,b:|r|].    ((a  *  b)  =  (b  *  a))


By

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Latex:
ProveSpecializedLemma  `abmonoid\_comm`  1  [parm\{i\};r\mdownarrow{}xmn]  (AbReduceC)

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