criticallyfinite dynamics on the icosahedron 

text and graphics  
supporting definitions and data 
defns.txt 

quintic_defns.txt  
31map_subs.txt 

icos_group.txt 

notebooks run in the order given 
31map_condition 
derives the algebraic condition for criticallyfinite 31maps 
1) edge_construct_achiral_31map.nb 
visually builds a forwardinvariant system of edges 

2) edge_pullback_achiral_31map.nb 
pulls the system of edges back 

3) map_color_topology.nb 
generates a color plot of the map's behavior with edgepullback overlaid 

Mathematica file archive 