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Step * 1 of Lemma one-mul

.....assertion..... 
∀x:ℤ. ((1 * x) = x ∈ ℤ)
BY
{ TACTIC:((UnivCD THENA Auto) THEN Refine_multiplyOne THEN Fold `member` 0 THEN Declaration) }

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Latex:

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Latex:
.....assertion..... 
\mforall{}x:\mBbbZ{}.  ((1  *  x)  =  x)


By

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Latex:
TACTIC:((UnivCD  THENA  Auto)  THEN  Refine\_multiplyOne  THEN  Fold  `member`  0  THEN  Declaration)

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