- dnaupd - Interface for the Implicitly Restarted Arnoldi Iteration, to compute approximations to a few eigenpairs of a real linear operator
- dsaupd - Interface for the Implicitly Restarted Arnoldi Iteration, to compute approximations to a few eigenpairs of a real and symmetric linear operator
- gmres - generalized minimum residual method with restarts
- pcg - precondioned conjugate gradient
- qmr - quasi minimal resiqual method with preconditioning