//SINGULAR ExampleA.2.2





ring r=0,(x,y,z), dp;
poly f=x^2-y^2-z^2;
LIB"surf.lib";
plot(f);

f=x^3-y^2-z^2;
plot(f);

f=x4 + y4 + z4 + 1- x2 - y2 - z2 - y2z2 - z2x2 - x2y2;
plot(f,"scale_x=0.3;scale_y=0.3;scale_z=0.3;rot_x=0.1315; rot_y=5.6309; rot_z=6.2350;");