TITLE: H0w have group theory and fractal geometry been combined?
QUESTION [16 upvotes]: Has there been a significant tie made between group theory and fractal geometry? What are some ways that they have been tied together?
I've been inspired to ask this question by this image of a free group.

REPLY [4 votes]: See the book Indra's pearls by Mumford, Series and Wright for the wonders of Kleinian Groups.