Robert P. Munafo, 2002 May 7.
The constant, 3.1415926535897932... It shows up in a few places in the Mandelbrot set, perhaps most surprising is its relation to the dwell bands in cusps, (this is described in the entry R2.C(1/2)).
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