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11373Ruled quadrics

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  • Francois Rideau
    Jul 6, 2005
      Dear friends
      Beeing given 3 lines L_{1}, L_{2}, L_{3} in R^3 with equations:
      x = a_{k} z + b_{k}
      y = c_{k} z + d_{k}
      for k= 1, 2, 3
      1° Is there a simple way to write down an equation of the ruled
      quadric having these 3 lines as generators?
      2° Is it possible to write easily equations for the two systems
      of generators of this quadric?
      Friendly
      François
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