A graph consisting of 4 nodes and one edge. The <a href="https://en.wikipedia.org/wiki/automorphism_group" class="extiw" title="en:automorphism group">automorphism group</a> of this graph is the <a href="https://en.wikipedia.org/wiki/Klein_four-group" class="extiw" title="en:Klein four-group">Klein four-group</a>.
Geoff Richards (<a href="//commons.wikimedia.org/wiki/User:Qef" title="User:Qef">Qef</a>)
2008-08-31
Own work by uploader, hand-written SVG.