Robert P. Munafo, 1997 Nov 20.
The orbit of Z0 = 0+0i for a given value of C. It is called the "critical orbit" in discussions of Julia sets, where iteration is done on different Z0 values with the same C value. The origin 0+0i and its orbit are called "critical" because the behavior of this orbit is directly related to what type of Julia set you're looking at.
From the Mandelbrot Set Glossary and Encyclopedia, by Robert Munafo, (c) 1987-2017. Mu-ency index
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