Jeener-Fläche

x(u,v) = a*cos(u) + cos(a*u) - (((a+1)/4)cos((a+1)u+pi/b)+sqrt(c))*sin((a-1)u/2)*cos(v) y(u,v) = (((a+1)/4)*cos((a+1)u+pi/b)+sqrt(c))*sin(v) z(u,v) = a*sin(u) - sin(a*u) - (((a+1)/4)cos((a+1)u+pi/b)+sqrt(c))*cos((a-1)u/2)*cos(v)