Iterative solvers
- BiCG - BiConjugate gradients.
- BiCGstab - BiConjugate gradients stabilized.
- CG - Conjugate gradients.
- CGS - Conjugate gradients squared.
- Chebyshev - The Chebyshev iteration for symmetrical, positive definite matrices.
- GMRES - Generalized minimal residual using restart.
- IR - Iterative refinement (Richardson's method).
- QMR - Quasi-minimal residual.
- HyBR - Hybrid Bidiagonalization Regularization.
- MRNSD - Modified Residual Norm Steepest Descent.
- CGLS - Conjugate Gradient for Least Squares.