
(/VERSIONCHECK 2) 

(DEFPARAMETER |OrderedAbelianMonoid;AL| 'NIL) 

(DEFUN |OrderedAbelianMonoid| ()
  (LET (#:G1817)
    (COND
      (|OrderedAbelianMonoid;AL|)
      (T (SETQ |OrderedAbelianMonoid;AL| (|OrderedAbelianMonoid;|)))))) 

(DEFUN |OrderedAbelianMonoid;| ()
  (PROG (#0=#:G1815)
    (RETURN
      (PROG1 (LETT #0#
                   (|Join| (|OrderedAbelianSemiGroup|)
                           (|AbelianMonoid|))
                   |OrderedAbelianMonoid|)
        (SETELT #0# 0 '(|OrderedAbelianMonoid|)))))) 

(MAKEPROP '|OrderedAbelianMonoid| 'NILADIC T) 
