!  -*-f90-*-  (for emacs)    vim:set filetype=fortran:  (for vim)
  private
 
  public :: register_particles_grad, initialize_particles_grad
  public :: pencil_criteria_par_grad
  public :: dsigmap_dt, dsigmap_dt_pencil
  public :: read_particles_grad_init_pars, write_particles_grad_init_pars
  public :: read_particles_grad_run_pars, write_particles_grad_run_pars
  public :: rprint_particles_grad, set_particle_grad