[CEMI] Re: [EMHL] Re: comparison of axes constructions for central conics
- Dear Jeff, Jean-Pierre, Eisso and other colleagues!
I can add that we can construct the center of conic if its five points are given.
In fact using the Pascal theorem we can construct the tangents in given points. Consider the quadrilateral formed by any four of these lines. The centers of its inscribed conics lie on the Gauss line. So the common point of two such lines is the required center.
For the record:
Your post and your correction both have opened my eyes to things I
never knew or quite understood.
Thank you very much for your detailed explanations. I did not know the
use of polars and polar points in the construction of iso-conjugations
as you described it (and I have looked at many online materials dealing
with iso-conjugations for some years.) Something connected here for me
and this is going to keep me very busy for a while. Thank you again.
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