1 files changed, 56 insertions, 0 deletions
diff --git a/src/algebra/strap/DIVRING-.lsp b/src/algebra/strap/DIVRING-.lsp
new file mode 100644
index 00000000..e3efca81
--- /dev/null
+++ b/src/algebra/strap/DIVRING-.lsp
@@ -0,0 +1,56 @@
+
+(/VERSIONCHECK 2) 
+
+(DEFUN |DIVRING-;^;SIS;1| (|x| |n| $)
+  (SPADCALL |x| |n| (QREFELT $ 8))) 
+
+(DEFUN |DIVRING-;**;SIS;2| (|x| |n| $)
+  (COND
+    ((ZEROP |n|) (|spadConstant| $ 10))
+    ((SPADCALL |x| (QREFELT $ 12))
+     (COND ((< |n| 0) (|error| "division by zero")) ('T |x|)))
+    ((< |n| 0)
+     (SPADCALL (SPADCALL |x| (QREFELT $ 14)) (- |n|) (QREFELT $ 17)))
+    ('T (SPADCALL |x| |n| (QREFELT $ 17))))) 
+
+(DEFUN |DIVRING-;*;F2S;3| (|q| |x| $)
+  (SPADCALL
+      (SPADCALL (SPADCALL |q| (QREFELT $ 20))
+          (SPADCALL
+              (SPADCALL (SPADCALL |q| (QREFELT $ 21)) (QREFELT $ 22))
+              (QREFELT $ 14))
+          (QREFELT $ 23))
+      |x| (QREFELT $ 24))) 
+
+(DEFUN |DivisionRing&| (|#1|)
+  (PROG (|dv$1| |dv$| $ |pv$|)
+    (RETURN
+      (PROGN
+        (LETT |dv$1| (|devaluate| |#1|) . #0=(|DivisionRing&|))
+        (LETT |dv$| (LIST '|DivisionRing&| |dv$1|) . #0#)
+        (LETT $ (GETREFV 27) . #0#)
+        (QSETREFV $ 0 |dv$|)
+        (QSETREFV $ 3 (LETT |pv$| (|buildPredVector| 0 0 NIL) . #0#))
+        (|stuffDomainSlots| $)
+        (QSETREFV $ 6 |#1|)
+        $)))) 
+
+(MAKEPROP '|DivisionRing&| '|infovec|
+    (LIST '#(NIL NIL NIL NIL NIL NIL (|local| |#1|) (|Integer|)
+             (0 . **) |DIVRING-;^;SIS;1| (6 . |One|) (|Boolean|)
+             (10 . |zero?|) (15 . |Zero|) (19 . |inv|)
+             (|PositiveInteger|) (|RepeatedSquaring| 6) (24 . |expt|)
+             |DIVRING-;**;SIS;2| (|Fraction| 7) (30 . |numer|)
+             (35 . |denom|) (40 . |coerce|) (45 . *) (51 . *)
+             |DIVRING-;*;F2S;3| (|NonNegativeInteger|))
+          '#(^ 57 ** 63 * 69) 'NIL
+          (CONS (|makeByteWordVec2| 1 'NIL)
+                (CONS '#()
+                      (CONS '#()
+                            (|makeByteWordVec2| 25
+                                '(2 6 0 0 7 8 0 6 0 10 1 6 11 0 12 0 6
+                                  0 13 1 6 0 0 14 2 16 6 6 15 17 1 19 7
+                                  0 20 1 19 7 0 21 1 6 0 7 22 2 6 0 7 0
+                                  23 2 6 0 0 0 24 2 0 0 0 7 9 2 0 0 0 7
+                                  18 2 0 0 19 0 25)))))
+          '|lookupComplete|))