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Re: a general formula for the following

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  • David Broadhurst
    PS: I left out a square sign, here restored: for p = 0 mod 4, the number of odd coprime pairs [x,y] with p^2 = x^2 - y^2 is 2^k where k is the number of
    Message 1 of 3 , Apr 2 9:34 AM
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      PS: I left out a square sign, here restored:

      for p = 0 mod 4, the number of odd coprime pairs [x,y]
      with p^2 = x^2 - y^2 is 2^k where k is the number of distinct
      odd prime divisors of p.

      David^2
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