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18417Re: [EMHL] Pencil of conics

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  • Bernard Gibert
    Nov 1, 2009
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      Dear Quim,

      > I want to draw a conic of the pencil generated by two known conics,
      > knowing also its center. How can I get the five points needed?

      the center must lie on the nine points conic of the pencil to get a
      solution.

      this conic passes through the two centers of the two conics and
      through the vertices of the self-polar (diagonal) triangle in both
      conics.

      when the two conics have four real common points, the construction is
      easy.

      Best regards

      Bernard

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