Then we concentrate on the construction of the discrete space of Lagrange multiplier, the space of mortar elements, and the conjugated gradient method for the related saddle point problem.

To improve the convergence rate of the krylov subspace methods to solve saddle point problems,the block overrelaxation-type preconditioner is presented based on the block overrelaxation-type matrix splitting of the coefficient matrix.

In this paper,we present a convergent result of the iterative solution methods for a class of generalized saddle point problem,which lowers the condition of the recent results.

In this paper,we prove that in the sense of Baire category,most of the saddle point problems are generic.

Solving saddle point problems for large and sparse systems is applied in many fields, such as constrained optimization,least square problems,image management and so on.

In this paper,we extend the ST decomposition to the generalized saddle point problem and present three block triangular preconditioners.

This article sums up eight aspects about the hot spot of environmental pollution with which we are faced in the hope that people attach great importance to environmental protection and take efficient measures against these problems to ensure sustainable development.

Around these four years, the hot spot of comparative research on higher educational policies moved around private higher education policy, finance policy, internationalization policy, students policy and managerment & evaluation policy, etc.

During the past few years, China s education researchers have conducted extensive studies of hot spots of the nation s higher education and also expanded their investigations into new areas.

Objective To explore the difficulties and countermeasures in the morning shifting report in English.