Resumen de Positive stable block triangular preconditioners for symmetric saddle point problems

Zhi-Hao Cao

• In this paper we discuss the spectral properties and the computational performance of a positive stable block triangular preconditioner for the solution of the general symmetric saddle point problem. We will show that the eigenvalues of the preconditioned matrix are all real and provide estimates for the interval containing these real eigenvalues. Numerical experiments of a model Stokes problem are presented.