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Topic: Conic eccentricity through five points
Replies: 8   Last Post: Jul 22, 2013 2:08 PM

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Brian Q. Hutchings

Posts: 6,427
Registered: 12/6/04
Conic eccentricity through five points
Posted: Jun 6, 2013 10:25 PM
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cool problem; I knew about 5 points defining a conic,
but not that it was related to those coeffs., duh.

> Find eccentricity of a conic in terms of 5 points
(x1,y1) to (x5,y5); as there are 5 constants
in  a x^2 + 2 h x y + b y^2 + 2 f x + 2 g y  = 1.

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