image Require spectral decomposition of RMHD equations or solution of RMHD Riemann problem except HLL. Van Putten [178] has studied the characteristic structure of the RMHD equations in (constraint free) divergence form as a first step to extend modern HRSC methods to RMHD. Komissarov [84] has developed a multidimensional RMHD code based on a linearized Riemann solver.