<area shape="rect" href="$a00044.html" title="Structural element for free monoid." alt="" coords="5,343,371,369">
<area shape="rect" href="$a00082.html" title="The base class of all structures that are monoids." alt="" coords="111,263,265,289">
<area shape="rect" href="$a00100.html" title="Base class of all structures that are semigroups." alt="" coords="99,183,277,209">
<area shape="rect" href="$a00122.html" title="Structure\&lt; Self \&gt;" alt="" coords="120,103,256,129">
<area shape="rect" href="$a00122.html" title="Base class for the hierarchy of structural element types." alt="" coords="147,7,229,33">
<area shape="rect" title="\&lt; Self \&gt;" alt="" coords="184,31,192,39">
<area shape="rect" title="\&lt; Self \&gt;" alt="" coords="184,99,192,107">
