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Step * of Lemma mon_assoc_fps

∀[X:Type]. ∀[r:CRng]. ∀[a,b,c:PowerSeries(X;r)].  ((a+(b+c)) = ((a+b)+c) ∈ PowerSeries(X;r))
BY
{ xxxAutoxxx }

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Latex:

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Latex:
\mforall{}[X:Type].  \mforall{}[r:CRng].  \mforall{}[a,b,c:PowerSeries(X;r)].    ((a+(b+c))  =  ((a+b)+c))


By

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Latex:
xxxAutoxxx

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