
(/VERSIONCHECK 2) 

(DEFPARAMETER |AbelianMonoid;AL| 'NIL) 

(DEFUN |AbelianMonoid| ()
  (LET (#:G1623)
    (COND (|AbelianMonoid;AL|)
          (T (SETQ |AbelianMonoid;AL| (|AbelianMonoid;|)))))) 

(DEFUN |AbelianMonoid;| ()
  (PROG (#1=#:G1621)
    (RETURN
     (PROG1
         (LETT #1#
               (|Join| (|AbelianSemiGroup|)
                       (|mkCategory| '|domain|
                                     '(((|Zero| ($) |constant|) T)
                                       ((|sample| ($) |constant|) T)
                                       ((|zero?| ((|Boolean|) $)) T)
                                       ((* ($ (|NonNegativeInteger|) $)) T))
                                     NIL '((|NonNegativeInteger|) (|Boolean|))
                                     NIL))
               |AbelianMonoid|)
       (SETELT #1# 0 '(|AbelianMonoid|)))))) 

(MAKEPROP '|AbelianMonoid| 'NILADIC T) 
