在三角形网格削分下,针对一类椭圆型方程的保对称有限体元格式,给出了一种预条件子构造技术。并从理论上严格证明了新的PCG方法条件数的一致有界性.实验结果进一步验证了理论的正确性。
A new preconditioned conjugate gradient method for symmetric finite volume element systems of a class of elliptic problems on triangular mesh is presented and analyzed. The optimal condition number which is independent of the mesh size is obtained. Numerical experiments confirm the efficiency of the algorithm.