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Step * of Lemma mul_preserves_eq

∀[a,b,n:ℤ].  (n * a) = (n * b) ∈ ℤ supposing a = b ∈ ℤ
BY
{ Auto }

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Latex:

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


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Latex:
Auto

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