 an evolver; not all need to be used in a give case">EvolverVariables</a></li><li class="current-entities indented2"><a href="Expression$.html" title="" class="object"></a> <a href="Expression.html" title="" class="trait"></a><a href="Expression.html" title="">Expression</a></li><li class="current-entities indented2"><a href="ExpressionEquationIndexifier$.html" title="" class="object"></a> <a href="ExpressionEquationIndexifier.html" title="Maps equations based on expressions in terms, randomvariables etc." 