  We present the first study of the multiscaling of time-dependent velocity and
magnetic-field structure functions in homogeneous, isotropic
magnetohydrodynamic (MHD) turbulence in three dimensions. We generalize the
formalism that has been developed for analogous studies of time-dependent
structure functions in fluid turbulence to MHD. By carrying out detailed
numerical studies of such time-dependent structure functions in a shell model
for three-dimensional MHD turbulence, we obtain both equal-time and dynamic
scaling exponents.

Fluid Dynamics;Statistical Mechanics;Chaotic Dynamics