Hostname: page-component-669899f699-tpknm Total loading time: 0 Render date: 2025-04-25T23:27:24.260Z Has data issue: false hasContentIssue false
  • English
  • Français

A direct method of obtaining the Foci and Directrices from the general equation

Published online by Cambridge University Press:  20 January 2009

D. K. Picken
Rights & Permissions [Opens in a new window]

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.

The general equation of the second degree in two variables

can be brought by a direct process into the form

the determination of the constants ξ η l, m, n depending only on the solution of quadratic equations; so that the method is suitable for determining the foci, directrices, and eccentricities of conies with given numerical equations.

Type
Research Article
Information
Proceedings of the Edinburgh Mathematical Society , Volume 23 , February 1904 , pp. 96 - 99
Copyright
Copyright © Edinburgh Mathematical Society 1904