<a href="https://en.wikipedia.org/wiki/Root_system" class="extiw" title="en:Root system">en:Root system</a> of <a href="https://en.wikipedia.org/wiki/E8_(mathematics)" class="extiw" title="en:E8 (mathematics)">E8</a> made by hand with thread, based on the famous computer picture by <a href="https://en.wikipedia.org/wiki/John_Stembridge" class="extiw" title="en:John Stembridge">en:John Stembridge</a>.
<a href="//commons.wikimedia.org/wiki/User:Jlrodri" title="User:Jlrodri">Jlrodri</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span> <a rel="nofollow" class="external autonumber" href="http://topologia.wordpress.com/2010/10/10/e8-con-hilo-tensado/">[1]</a>