diff options
Diffstat (limited to 'src/algebra/strap/DIFRING.lsp')
| -rw-r--r-- | src/algebra/strap/DIFRING.lsp | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/algebra/strap/DIFRING.lsp b/src/algebra/strap/DIFRING.lsp new file mode 100644 index 00000000..3c823149 --- /dev/null +++ b/src/algebra/strap/DIFRING.lsp @@ -0,0 +1,28 @@ + +(/VERSIONCHECK 2) + +(DEFPARAMETER |DifferentialRing;AL| 'NIL) + +(DEFUN |DifferentialRing| () + (LET (#:G1387) + (COND + (|DifferentialRing;AL|) + (T (SETQ |DifferentialRing;AL| (|DifferentialRing;|)))))) + +(DEFUN |DifferentialRing;| () + (PROG (#0=#:G1385) + (RETURN + (PROG1 (LETT #0# + (|Join| (|Ring|) + (|mkCategory| '|domain| + '(((|differentiate| ($ $)) T) + ((D ($ $)) T) + ((|differentiate| + ($ $ (|NonNegativeInteger|))) + T) + ((D ($ $ (|NonNegativeInteger|))) T)) + NIL '((|NonNegativeInteger|)) NIL)) + |DifferentialRing|) + (SETELT #0# 0 '(|DifferentialRing|)))))) + +(MAKEPROP '|DifferentialRing| 'NILADIC T) |