 Non-uniform meshes are advantageous because they allow the use of large elements where the process to be simulated is relatively simple, as opposed to a fine resolution where the process may be complicated (e.g., near an obstruction to a fluid flow), while using less computational power than if a uniformly fine mesh were used.Stokes' theorem relates the integral of a differential ("n" − 1)-form "ω" over the boundary ∂"M" of an "n"-dimensional manifold "M" to the integral of d"ω" (the exterior derivative of "ω", and a differential "n"-form on "M") over "M" itself