Definition:Imaginary Straight Line
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Definition
An imaginary straight line in the Cartesian plane is a straight line whose equation includes the imaginary unit $i$ somewhere in its definition.
 | This article, or a section of it, needs explaining. In particular: Yes I know this is an appallingly loose definition, I got it from Sommerville who is less than limpid. You can help $\mathsf{Pr} \infty \mathsf{fWiki}$ by explaining it. 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 {{Explain}} from the code. |
Sources
- 1933: D.M.Y. Sommerville: Analytical Conics (3rd ed.) ... (previous) ... (next): Chapter $\text {II}$. The Straight Line: $15$. The homogeneous equation of second degree