1LoadPackage( "RingsForHomalg" ); 2 3LoadPackage( "Modules" ); 4 5Qxyz := HomalgFieldOfRationalsInDefaultCAS( ) * "x,y,z"; 6 7wmat := HomalgMatrix( "[ \ 80, -2*x, z-2*y-x, -1, \ 90, z-2*x, 2*y-3*x, 1, \ 10z, -6*x, -2*y-5*x, -1, \ 110, y-x, y-x, 0, \ 12y, -x, -y-x, 0, \ 13x, -x, -2*x, 0 \ 14]", 6, 4, Qxyz ); 15 16W := LeftPresentation( wmat ); 17 18