Definition:Ring-Contact
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Definition
This definition needs to be completed. In particular: It is not straightforward to "just" craft a rigorous definition for this. Sommerville, which exemplifies the term, does not define it except via its instance as where a Dandelin sphere touches a cone. You can help $\mathsf{Pr} \infty \mathsf{fWiki}$ by adding or completing the definition. To discuss this page in more detail, feel free to use the talk page. When this work has been completed, you may remove this instance of {{DefinitionWanted}} from the code.If you would welcome a second opinion as to whether your work is correct, add a call to {{Proofread}} the page. |
Sources
- 1933: D.M.Y. Sommerville: Analytical Conics (3rd ed.) ... (previous) ... (next): Chapter $\text {IV}$. The Ellipse: $1 \text a$. Focal properties