1 Formulation of the Problem : Need to Explain Empirical Success of Vertical Line Element Techniques

One of the main objectives of geophysics is to find how density ρ and other physical characteristics depend on a 3-D location (x, y, z). In general, in numerical methods, a way to find the dependence ρ(x, y, z) is to discretize the space, and to consider, as unknown, e.g., values ρ(x, y, z) on a 3-D rectangular grid. In this case, the desired density… (More)