This paper deals with solving a class of three-by-three block saddle point problems. The systems are solved by preconditioning techniques. Based on an iterative method, we construct a block upper triangular preconditioner. The convergence of the presented method is studied in details. Finally, some numerical experiments are given to demonstrate the superiority of the proposed preconditioner over some existing ones.

翻译：本文涉及解决一组三三分之三的区块支架问题。 系统通过先决条件技术解决。 我们用迭代方法构建了一个区块的上三角前置装置。 详细研究了所介绍方法的趋同性。 最后, 进行了一些数字实验, 以证明所拟议的先决条件优于某些现有先决条件。