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Ab ≡ 0 (mod N)

  1. Aug 2, 2006 #1
    ab ≡ 0 (mod m), where a and b are positive integer < m.
    Does it follow that either a| m or b| m?

    Can anyone give a proof for this ?
  2. jcsd
  3. Aug 2, 2006 #2


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    Not true. Example: a=8, b=9, m=12.
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