No CrossRef data available.
Article contents
On the stationary eccentricity of a system of conies through four given points
Published online by Cambridge University Press: 20 January 2009
Extract
Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
Let the equation of the four point system be
where h is a variable parameter and a, b, g, f and c are constants. The four fixed points are thus given by and
. Since the quadrilateral is real g2>ac and f2>bc: it is convex if
and
have the same sign, i.e. if ab is positive, and concave if ab is negative.
- Type
- Research Article
- Information
- Copyright
- Copyright © Edinburgh Mathematical Society 1909