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4.4.1 ideal declarations

Syntax:
ideal name = list_of_poly_and_ideal_expressions ;
ideal name = ideal_expression ;

Purpose:
defines an ideal.

Default:
0

Example:
 
  ring r=0,(x,y,z),dp;
  poly s1 = x2;
  poly s2 = y3;
  poly s3 = z;
  ideal i =  s1, s2-s1, 0,s2*s3, s3^4;
  i;
==> i[1]=x2
==> i[2]=y3-x2
==> i[3]=0
==> i[4]=y3z
==> i[5]=z4
  size(i);
==> 4
  ncols(i);
==> 5