Sentence Examples

  • Confocal conics are conics having the same foci.
  • If one of the foci be at infinity, the conics are confocal parabolas, which may also be regarded as parabolas having a common focus and axis.
  • An important property of confocal systems is that only two confocals can be drawn through a specified point, one being an ellipse, the other a hyperbola, and they intersect orthogonally.
  • For different values of 0 this represents a system of quadrics confocal with the ellipsoid ~f+~1+~I, (~4)
  • Now consider the tangent plane w at any point P of a confocal, the tangent plane fii at an adjacent point N, and a plane of through P parallel to of.

How would you define confocal? Add your definition here.

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