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Ellipse in intrinsic coordinates

  1. Mar 30, 2006 #1
    Does anyone know an equation for an ellipse (or other conics) in intrinsic coordinates, that is direction and curve length. It's the sort of thing that looks like it should be simple, but I've a feeling it may in fact be somewhat messy.
  2. jcsd
  3. Mar 30, 2006 #2
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