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Step * 2 1 of Lemma gcd_p_neg_arg_2


1. a : ℤ
2. b : ℤ
3. y : ℤ
4. GCD(a;-b;y)
⊢ GCD(a;--b;y)
BY
{ (BLemma `gcd_p_neg_arg` THEN Auto) }

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Latex:

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Latex:

1.  a  :  \mBbbZ{}
2.  b  :  \mBbbZ{}
3.  y  :  \mBbbZ{}
4.  GCD(a;-b;y)
\mvdash{}  GCD(a;--b;y)


By

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Latex:
(BLemma  `gcd\_p\_neg\_arg`  THEN  Auto)

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