|  |  5.1.67 janet 
See
 groebner;
 ideal;
 std.Syntax:janet (ideal_expression)
 janet (ideal_expression,int_expression)Type:ideal
Purpose:computes the Janet basis of the given ideal, resp.  the standard basis
if 1 is given as the second argument.
Remark:It works only with global orderings.
Example:|  |   ring r=0,(x,y,z),dp;
  ideal i=x*y*z-1,x+y+z,x*y+x*z+y*z; // cyclic 3
  janet(i);
==> Length of Janet basis: 4
==> _[1]=x+y+z
==> _[2]=y2+yz+z2
==> _[3]=z3-1
==> _[4]=yz3-y
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