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Step * of Lemma mul_ac_1_fps

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∀[X:Type]
  ∀[eq:EqDecider(X)]. ∀[r:CRng]. ∀[a,b,c:PowerSeries(X;r)].  ((a*(b*c)) = (b*(a*c)) ∈ PowerSeries(X;r)) 
  supposing valueall-type(X)
BY
{ (RepeatFor 3 ((D 0 THENA Auto)) THEN (ProveSpecializedLemmaWReduce crng_times_ac_1) 1 [⌜parm{i}⌝; ⌜fps-rng(r)⌝]⋅) }

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Latex:

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Latex:
No  Annotations
\mforall{}[X:Type]
    \mforall{}[eq:EqDecider(X)].  \mforall{}[r:CRng].  \mforall{}[a,b,c:PowerSeries(X;r)].    ((a*(b*c))  =  (b*(a*c))) 
    supposing  valueall-type(X)


By

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Latex:
(RepeatFor  3  ((D  0  THENA  Auto))
  THEN  (ProveSpecializedLemmaWReduce  crng\_times\_ac\_1)  1  [\mkleeneopen{}parm\{i\}\mkleeneclose{};  \mkleeneopen{}fps-rng(r)\mkleeneclose{}]\mcdot{}
  )

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