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SPARSIFYING PRECONDITIONER FOR PSEUDOSPECTRAL APPROXIMATIONS OF INDEFINITE SYSTEMS ON PERIODIC STRUCTURES
Helmholtz equation Schrodinger equation preconditioner pseudospectral approximation indefinite matrix periodic structure sparse linear algebra
2015/7/14
This paper introduces the sparsifying preconditioner for the pseudospectral approximation of highly indefinite systems on periodic structures, which include the frequency-domain response problems of t...
PRECONDITIONERS FOR INDEFINITE SYSTEMS ARISING IN OPTIMIZATION
indefinite systems preconditioners linear programming
2015/7/3
Methods are discussed for the solution of sparse linear equations Ky z, where K is
symmetric and indefinite. Since exact solutions are not always required, direct and iterative methods
are both of i...