/i><b>1.4</b> Purpose, structure and organization of this book</a></li>
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<li class="chapter" data-level="2" data-path="working.html"><a href="working.html"><i class="fa fa-check"></i><b>2</b> Working with Graphs</a>
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<li class="chapter" data-level="2.1" data-path="working.html"><a href="working.html#elementary-graph-theory"><i class="fa fa-check"></i><b>2.1</b> Elementary graph theory</a>
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<li class="chapter" data-level="2.1.1" data-path="working.html"><a href="working.html#graph-def"><i c