Robert P. Munafo, 2002 May 6.
A primary filament is part of a mu molecule but it not part of any smaller mu-unit. More accurately, (and for the R2 naming system) a primary filament is a maximal subset of a mu-molecule that does not intersect any of the mu-molecule's subset mu-units. This is a more restrictive definition than first order filament, which doesn't require the filament's owner to be a mu-molecule.
For example, compare the two figures in the mu-unit article. Figure 1 includes primary filaments; figure 2 approximates the appearance of the mu-unit R2.1/3 with the primary filaments removed.
See also primary filament operator.
revisions: 20020506 oldest on record; 20100918 add example
From the Mandelbrot Set Glossary and Encyclopedia, by Robert Munafo, (c) 1987-2017. Mu-ency index
This page was written in the "embarrassingly readable" markup language RHTF, and was last updated on 2017 Feb 02. s.11