src/Expr.html#Desc" class="link">Source</a> <a href="#t:Desc" class="selflink">#</a></p><div class="doc"><p>Desc is the description of a function, 
 especially built to make comparisons of user defined expressions possible.</p></div><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a id="v:Desc" class="def">Desc</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><div class="subs fields"><p class="caption">Fields</p><ul><li><dfn class="src"><a id="v: