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| class | Eigen::DGMRES< MatrixType_, Preconditioner_ > |
| | A Restarted GMRES with deflation. This class implements a modification of the GMRES solver for sparse linear systems. The basis is built with modified Gram-Schmidt. At each restart, a few approximated eigenvectors corresponding to the smallest eigenvalues are used to build a preconditioner for the next cycle. This preconditioner for deflation can be combined with any other preconditioner, the IncompleteLUT for instance. The preconditioner is applied at right of the matrix and the combination is multiplicative. More...
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| template<typename VectorType , typename IndexType > |
| void | Eigen::internal::sortWithPermutation (VectorType &vec, IndexType &perm, typename IndexType::Scalar &ncut) |
| | Computes a permutation vector to have a sorted sequence. More...
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