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5.1.62 janet

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
See groebner; ideal; std.

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