采用有限差分法对二维静电场的数值计算。用mathematica语言编的源程序。-using the finite difference method to two-dimensional electrostatic field of numerical calculation. Using Mathematica addendum to the source.

这个程序是利用时域有限差分方法求多层介质中的电场分布的-this procedure is to use the finite difference time domain method for multi-media distribution of the electric field