The Mandelbrot Set and Julia Sets

Combinatorics in the Mandelbrot Set - Principal Series

We begin by looking for patterns in the n-cycle components (discs) attached around the big cardioid.
Starting from the 2-cycle disc, proceeding around the top of the big cardioid we encounter
  a 3-cycle disc,
  a 4-cycle disc,
  a 5-cycle disc,
  ... and so on.
This is the upper principal series.
The analogous sequence along the bottom of the cardioid is the lower principal series.

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