===================================================================
RCS file: /home/cvs/OpenXM/src/kan96xx/Kan/dr.sm1,v
retrieving revision 1.4
retrieving revision 1.8
diff -u -p -r1.4 -r1.8
--- OpenXM/src/kan96xx/Kan/dr.sm1	2000/06/15 07:33:29	1.4
+++ OpenXM/src/kan96xx/Kan/dr.sm1	2002/02/09 06:21:02	1.8
@@ -1,9 +1,9 @@
-% $OpenXM: OpenXM/src/kan96xx/Kan/dr.sm1,v 1.3 2000/02/02 09:07:59 takayama Exp $
+% $OpenXM: OpenXM/src/kan96xx/Kan/dr.sm1,v 1.7 2000/12/29 07:19:38 takayama Exp $
 %% dr.sm1 (Define Ring) 1994/9/25, 26
 %% This file is error clean.
 
 @@@.quiet {   }
-{ (macro package : dr.sm1,   9/26,1995 --- Version 6/15, 2000. ) message } ifelse
+{ (macro package : dr.sm1,   9/26,1995 --- Version 12/10, 2000. ) message } ifelse
 
 /ctrlC-hook {
 %%% define your own routing in case of error.
@@ -257,6 +257,8 @@
   /arg1 set
   [/vars /n /i /xList /dList /param] pushVariables
   [
+     (This is an obsolete macro. Use ring_of_differential_difference_operators)
+      error 
      (mmLarger) (matrix) switch_function
      (mpMult)   (difference) switch_function
      (red@)     (module1) switch_function
@@ -278,7 +280,44 @@
 } def
 
 
+/ring_of_differential_difference_operators {
+  /arg1 set
+  [/vars /n /i /xList /dList /param /dvar /evar /vars2 ] pushVariables
+  [
+     /vars arg1 def
+     vars tag 6 eq not {
+       ( List is expected as the argument for ring_of_differential_difference_operators ) error
+     } { } ifelse
+     vars 0 get /dvar set
+     vars 1 get /evar set
+     (mmLarger) (matrix) switch_function
+     (mpMult)   (difference) switch_function
+     (red@)     (module1) switch_function
+     (groebner) (standard) switch_function
+     (isSameComponent) (x) switch_function
 
+     [dvar to_records pop] /vars set %[x y z]
+     vars reverse /xList set         %[z y x]
+
+     [evar to_records pop] /vars2 set %[s1 s2]
+
+     vars2 reverse  {@@@.Esymbol 2 1 roll 2 cat_n} map
+     xList 
+     join /xList set   %[Es2 Es1 z y x]
+
+     vars2 reverse
+     vars {@@@.Dsymbol 2 1 roll 2 cat_n} map
+     reverse join /dList set              %[s2 s1 Dz Dy Dx]
+     [(H)] xList join [@@@.esymbol] join /xList set
+     [(h)] dList join [@@@.Esymbol] join /dList set
+     [0 1 1 << vars2 length 1 add >>  << xList length >>
+        1 1 << vars2 length 1 add >> << xList length 1 sub >> ] /param set
+     [ xList dList param ] /arg1 set
+  ] pop
+  popVariables
+  arg1
+} def
+
 /reverse {
   /arg1 set
   arg1 length 1 lt
@@ -1474,6 +1513,13 @@
   (type?) data_conversion  RationalFunctionP eq
 } def
 
+[(isRing)
+ [(obj isRing bool) ]
+] putUsages
+/isRing {
+  (type?) data_conversion  RingP eq
+} def
+
 /toString.tmp {
   /arg1 set
   [/obj /fname] pushVariables
@@ -3559,6 +3605,45 @@ $ [ff ff] fromVectors :: $ 
  (All integers in obj are changed to universalNumber.)
  (Example: /ff [1 2 [(hello) (0).]] def  ff { tag } map ::)
  (         ff to_int { tag } map :: )
+]] putUsages
+
+/define_ring_variables {
+  [/in-define_ring_variables /drv._v /drv._p /drv._v0] pushVariables
+%% You cannot use these names for names for polynomials.
+  [
+     /drv._v getVariableNames def
+     /drv._v0 drv._v def
+     drv._v { dup /drv._p set (/) 2 1 roll ( $) drv._p ($. def ) } map cat
+     /drv._v set
+%     drv._v message
+     [(parse) drv._v] extension 
+  ] pop
+  popVariables
+} def
+[(define_ring_variables)
+[(It binds  a variable <<a>> in the current ring to the sm1 variable <<a>>.)
+ (For example, if x is a variable in the current ring, it defines the sm1)
+ (variable x by /x (x) def)
+]] putUsages
+
+/boundp {
+  /arg1 set
+  [/a /ans] pushVariables
+  [
+    /a arg1 def
+    [(parse) [(/) a ( load tag 0 eq { /ans 0 def } )
+                    (               { /ans 1 def } ifelse )] cat ] extension
+    /arg1 ans def
+  ] pop
+  popVariables
+  arg1
+} def
+[(boundp)
+ [( a boundp b)
+  (string a, b is 0 or 1.)
+  (If the variable named << a >> is bounded to a value,)
+  (it returns 1 else it returns 0.)
+  $Example: (hoge) boundp ::$
 ]] putUsages
 
 ;