Keywords: 3 21 polytope e6.png uniform 7-polytope graph E6 petrie polygon basis Transferred from http //en wikipedia org en wikipedia; transferred to Commons by User Sreejithk2000 using http //tools wikimedia de/~magnus/commonshelper php CommonsHelper <br/> Original text I Tom Ruen talk created this work entirely by myself 00 24 11 June 2010 UTC <br/> 2010 06 11 original upload date Tom Ruen talk Original uploader was Tomruen at http //en wikipedia org en wikipedia Released into the public domain by the author en wikipedia Tomruen original upload log page en wikipedia 3_21_polytope_e6 png 2010-06-11 00 24 Tomruen 807×793× 84084 bytes <nowiki> uniform 7-polytope graph E6 petrie polygon basis I ~~~ created this work entirely by myself ~~~~~ ~~~ </nowiki> Set of colored Coxeter plane graphs; 25 vertices |