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In 1657, Fermat challenged the mathematicians of Europe and England, "We await these solutions, which, if England or Belgic or Celtic Gaul do not produce, then Narbonese Gaul (Fermat's region) will." Among the challenges was this 500-year-old example from Bhaskara II: x2 - 61y2 = 1 (x, y > 0). [Balazs]


  Submitted: 1999-09-02 18:40:00;   Last Modified: 2009-03-13 14:59:14.

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