
(/VERSIONCHECK 2) 

(DEFPARAMETER |DifferentialExtension;CAT| 'NIL) 

(DEFPARAMETER |DifferentialExtension;AL| 'NIL) 

(DEFUN |DifferentialExtension| (#0=#:G1816)
  (LET (#1=#:G1817)
    (COND
      ((SETQ #1#
             (|assoc| #2=(|devaluate| #0#) |DifferentialExtension;AL|))
       (CDR #1#))
      (T (SETQ |DifferentialExtension;AL|
               (|cons5| (CONS #2#
                              (SETQ #1# (|DifferentialExtension;| #0#)))
                        |DifferentialExtension;AL|))
         #1#)))) 

(DEFUN |DifferentialExtension;| (|t#1|)
  (PROG (#0=#:G1815)
    (RETURN
      (PROG1 (LETT #0#
                   (|sublisV|
                       (PAIR '(|t#1|) (LIST (|devaluate| |t#1|)))
                       (COND
                         (|DifferentialExtension;CAT|)
                         ('T
                          (LETT |DifferentialExtension;CAT|
                                (|Join| (|Ring|)
                                        (|mkCategory| '|domain|
                                         '(((|differentiate|
                                             ($ $
                                              (|Mapping| |t#1| |t#1|)))
                                            T)
                                           ((|differentiate|
                                             ($ $
                                              (|Mapping| |t#1| |t#1|)
                                              (|NonNegativeInteger|)))
                                            T)
                                           ((D
                                             ($ $
                                              (|Mapping| |t#1| |t#1|)))
                                            T)
                                           ((D
                                             ($ $
                                              (|Mapping| |t#1| |t#1|)
                                              (|NonNegativeInteger|)))
                                            T))
                                         '(((|DifferentialRing|)
                                            (|has| |t#1|
                                             (|DifferentialRing|)))
                                           ((|PartialDifferentialRing|
                                             (|Symbol|))
                                            (|has| |t#1|
                                             (|PartialDifferentialRing|
                                              (|Symbol|)))))
                                         '((|NonNegativeInteger|)) NIL))
                                . #1=(|DifferentialExtension|))))) . #1#)
        (SETELT #0# 0
                (LIST '|DifferentialExtension| (|devaluate| |t#1|))))))) 
