---

Step * of Lemma rmul_comm

∀[a,b:ℝ].  ((a * b) = (b * a))
BY
{ (Auto
   THEN BLemma `req-iff-bdd-diff`
   THEN Auto
   THEN (RWO "rmul-bdd-diff-reg-seq-mul" 0 THENA Auto)
   THEN BLemma `bdd-diff_weakening`
   THEN Auto) }

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Latex:

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


By

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Latex:
(Auto
  THEN  BLemma  `req-iff-bdd-diff`
  THEN  Auto
  THEN  (RWO  "rmul-bdd-diff-reg-seq-mul"  0  THENA  Auto)
  THEN  BLemma  `bdd-diff\_weakening`
  THEN  Auto)

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