Robert P. Munafo, 2008 Feb 28.
The line containing the points on the complex plane that are real numbers. It is normally oriented horizontally with the negative numbers on the left.
From the Mandelbrot Set Glossary and Encyclopedia, by Robert Munafo, (c) 1987-2018. Mu-ency index
This page was written in the "embarrassingly readable" markup language RHTF, and was last updated on 2018 Feb 04. s.11