User talk:Tomruen/Wythoffian operators

Sources
 * http://www.mathconsult.ch/lists/cgi/private/polyhedron/2006b/msg00273.html
 * http://www.mathconsult.ch/lists/cgi/private/polyhedron/2006b/msg00270.html
 * http://www.mathconsult.ch/lists/cgi/private/polyhedron/2006b/msg00346.html