Preconditioning Indefinite Systems in Interior Point Methods for Optimization
Computational Optimization and Applications
Block triangular preconditioners for symmetric saddle-point problems
Applied Numerical Mathematics - Numerical algorithms, parallelism and applications
Computational Optimization and Applications
Constraint Schur complement preconditioners for nonsymmetric saddle point problems
Applied Numerical Mathematics
Journal of Computational and Applied Mathematics
On HSS-based constraint preconditioners for generalized saddle-point problems
Numerical Algorithms
The generalized HSS method for solving singular linear systems
Journal of Computational and Applied Mathematics
A practical formula for computing optimal parameters in the HSS iteration methods
Journal of Computational and Applied Mathematics
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For large sparse systems of linear equations iterative solution techniques are attractive. In this paper we propose and examine the convergence of an iterative method for an important class of nonsymmetric and indefinite coefficient matrices based on the use of an indefinite and symmetric preconditioner. We apply our technique to the linearized Navier--Stokes equations (the Oseen equations).