摘要
Using one-dimensional compression storage technique to forward calculate the symmetrical sparse matrix.According to the symmetry and sparsity of the two matrices after Cholesky decomposition,a method of eliminate column is used firstly for the process of back substitution which takes more time throughout the total process. The examples show that the solution speed for geoelectric field of point source is five times faster than old one with the new method,and it improves the speed for the MT forward problem as fast as two times.