eturn NULL.
<A NAME="listterm_length"></A><HR><PRE><B>int listterm_length(<A HREF="term.html">Term</A> t);
</B></PRE>This function returns the length of a listterm.
<A NAME="listterm_member"></A><HR><PRE><B>BOOL listterm_member(<A HREF="term.html">Term</A> t, <A HREF="term.html">Term</A> lst);
</B></PRE>This function checks if <A HREF="term.html">Term</A> t is a member of a listterm (<A HREF="term.html">Term</A> lst).
<A NAME="listterm_reverse"></A><HR><PRE><B><A HREF="term.html">Term</A> listterm_reverse(<