-domain REL M CLASS)
&gt; &gt; ;;
&gt; &gt; ;; serve as an abbreviation for
&gt; &gt; ;;
&gt; &gt; ;;   (forall (VAR_1 ... VAR_n)
&gt; &gt; ;;           (=&gt; (REL VAR_1 ... VAR_n)
&gt; &gt; ;;               (instance-of VAR_m CLASS)))
&gt; &gt; ;;
&gt; &gt; ;; More generally, let M_1, ..., M_i be the numerals for
&gt; &gt; ;; positive integers m_1, ..., m_i, ordered by size, all
&gt; &gt; ;; less than or equal to n.  Then, in general, we let
&gt; &gt; ;;
&gt; &gt; ;;   (nth-domain REL M_1 CLASS_1 ... M_i 