<a href="https://en.wikipedia.org/wiki/Branch-decomposition" class="extiw" title="en:Branch-decomposition">Branch-decomposition</a> of a <a href="https://en.wikipedia.org/wiki/Grid_graph" class="extiw" title="en:Grid graph">grid graph</a>
<a href="//commons.wikimedia.org/wiki/User:David_Eppstein" class="mw-redirect" title="User:David Eppstein">David Eppstein</a>
<span class="int-own-work" lang="en">Own work</span>