===================================================================
RCS file: /home/cvs/OpenXM/src/kan96xx/Kan/usage.sm1,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -p -r1.4 -r1.5
--- OpenXM/src/kan96xx/Kan/usage.sm1	2002/02/09 06:21:02	1.4
+++ OpenXM/src/kan96xx/Kan/usage.sm1	2002/09/08 10:49:50	1.5
@@ -1,4 +1,4 @@
-%% $OpenXM: OpenXM/src/kan96xx/Kan/usage.sm1,v 1.3 2000/06/08 08:35:03 takayama Exp $
+%% $OpenXM: OpenXM/src/kan96xx/Kan/usage.sm1,v 1.4 2002/02/09 06:21:02 takayama Exp $
 %% usage.sm1
 %%  [(key word)
 %%    [(   )
@@ -103,6 +103,13 @@
    (The user cannot use the variable names h, e, H and E.)
    (cf. show_ring, system_variable --- CurrentRing)
    (    print_switch_status, switch_function)
+   (Example: [(x,y) ring_of_differential_operators [[(Dx) 1 (Dy) 1]])
+   (           weight_vector 0] define_ring)
+   (   Define the ring of differential operators Q<x,y,Dx,Dy> with the order)
+   (   obtained by refining the partial order defined by the weight vector)
+   (   [x,y,Dx,Dy] = [0,0,1,1] ) 
+   (Example: [(x,y) ring_of_differential_operators 0 [(weightedHomogenization) 1]])
+   (          define_ring )
    (Example: [(x,y,z) ring_of_differential_operators (Dx,Dy) elimination_order 0] define_ring)
    (         Dx,Dy, and Dz are corresponding differential operators to the )
    (         space variables x, y and z.)