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Knot theory: linking number

  1. Apr 1, 2008 #1
    i cannot find a proof anywhere to show that the linking number is always an integer! can someone please point me in the right direction (or give a proof of their own)! thanks.
  2. jcsd
  3. Apr 1, 2008 #2
    Two curves are either crossing or they are not, how can they be anywhere in between?
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