| Name | Description | Type | Package | Framework |
| ConjugateGradientSolver | standard conjugate gradient and pre-conditioned conjugate gradient. | Class | org.apache.mahout.math.solver | Apache Mahout |
| EigenDecomposition | Eigenvalues and eigenvectors of a real matrix. | Class | org.apache.mahout.math.solver | Apache Mahout |
| JacobiConditioner | Class | org.apache.mahout.math.solver | Apache Mahout | |
| LSMR | Solves sparse least-squares using the LSMR algorithm. | Class | org.apache.mahout.math.solver | Apache Mahout |
| Preconditioner | Interface | org.apache.mahout.math.solver | Apache Mahout | |