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(/VERSIONCHECK 2)
(DEFPARAMETER |DifferentialRing;AL| 'NIL)
(DEFUN |DifferentialRing;| ()
(LET ((#0=#:G1397
(|Join| (|Ring|) (|DifferentialDomain| '$)
(|mkCategory| '|domain|
'(((|differentiate|
($ $ (|NonNegativeInteger|)))
T)
((D ($ $ (|NonNegativeInteger|))) T))
NIL '((|NonNegativeInteger|)) NIL))))
(|setShellEntry| #0# 0 '(|DifferentialRing|))
#0#))
(DEFUN |DifferentialRing| ()
(COND
(|DifferentialRing;AL|)
(T (SETQ |DifferentialRing;AL| (|DifferentialRing;|)))))
(MAKEPROP '|DifferentialRing| 'NILADIC T)
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