Inclination structure of a mass-less (blue) and a self-gravitating M_disk = 10   M_Jup disks. Here the inclination is measured relative to the original plane of the disk. The inclination is shown as a function of semi major axis a at t = 1,3, and 5 Myr. Note that the mass-less disk is considerably warped due to the perturbations from the companion star, while the self-gravitating disk maintains a uniform inclination. in this case, the growth of inclination with time is due to the rigid precession of the disk relative to the binary star plane. The inclination returns back to zero after a precession period.