blob: 835648642e95dc8a06601e2840303b5d1e2cc0bd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
(/VERSIONCHECK 2)
(DEFPARAMETER |DifferentialRing;AL| 'NIL)
(DEFUN |DifferentialRing;| ()
(PROG (#0=#:G1398)
(RETURN
(PROG1 (LETT #0#
(|Join| (|Ring|)
(|mkCategory| '|domain|
'(((|differentiate| ($ $)) T)
((D ($ $)) T)
((|differentiate|
($ $ (|NonNegativeInteger|)))
T)
((D ($ $ (|NonNegativeInteger|))) T))
NIL '((|NonNegativeInteger|)) NIL))
|DifferentialRing|)
(|setShellEntry| #0# 0 '(|DifferentialRing|))))))
(DEFUN |DifferentialRing| ()
(LET ()
(COND
(|DifferentialRing;AL|)
(T (SETQ |DifferentialRing;AL| (|DifferentialRing;|))))))
(MAKEPROP '|DifferentialRing| 'NILADIC T)
|
