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Step * of Lemma reg-seq-mul-comm

∀[x,y:ℕ+ ⟶ ℤ].  (reg-seq-mul(x;y) = reg-seq-mul(y;x) ∈ (ℕ+ ⟶ ℤ))
BY
{ (Auto THEN RepUR ``reg-seq-mul`` 0 THEN EqCD THEN Reduce 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[x,y:\mBbbN{}\msupplus{}  {}\mrightarrow{}  \mBbbZ{}].    (reg-seq-mul(x;y)  =  reg-seq-mul(y;x))


By

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Latex:
(Auto  THEN  RepUR  ``reg-seq-mul``  0  THEN  EqCD  THEN  Reduce  0  THEN  Auto)

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