
(DECLAIM (NOTINLINE |AbelianSemiGroup;|)) 

(DEFPARAMETER |AbelianSemiGroup;AL| 'NIL) 

(DEFUN |AbelianSemiGroup| ()
  (COND (|AbelianSemiGroup;AL|)
        (T (SETQ |AbelianSemiGroup;AL| (|AbelianSemiGroup;|))))) 

(DEFUN |AbelianSemiGroup;| ()
  (SPROG ((#1=#:G1 NIL))
         (PROG1
             (LETT #1#
                   (|Join| (|SetCategory|)
                           (|mkCategory|
                            '(((+ (% % %)) T)
                              ((* (% (|PositiveInteger|) %)) T))
                            NIL NIL NIL)))
           (SETELT #1# 0 '(|AbelianSemiGroup|))))) 
