We compare the long-time error bounds and spatial resolution of finite difference methods with different discretizations for Dirac equation small electromagnetic potentials characterized by ??(0,1] a dimensionless parameter. begin simple widely used time domain (FDTD) methods, establish rigorous them, which are valid up to at O(1/?). In estimates, we pay particular attention how errors depend e...

seismic tomography is an imaging technique which creates maps of subsurface elastic properties such as p/s wave velocity, density and attenuation, based on observed seismograms and use of sophisticated inversion algorithms. amongst different acquisition geometries, seismic cross-hole tomography has a special position in geophysical surveys with many applications in hydrocarbons, coal and other ...