The coefficient matrices E_i are the extra matrices of the DS, and the scalar functions f_i are passed via DSNEPSetFN(). Optionally, a callback function to fill the E_i matrices can be set with DSNEPSetComputeMatrixFunction().
DS_MAT_Ex | - coefficient matrices of the split form of T(lambda) | |
DS_MAT_X | - eigenvectors | |
DS_MAT_A | - (workspace) T(lambda) evaluated at a given lambda (SLP only) | |
DS_MAT_B | - (workspace) T'(lambda) evaluated at a given lambda (SLP only) | |
DS_MAT_Q | - (workspace) left Hankel matrix (contour only) | |
DS_MAT_Z | - (workspace) right Hankel matrix (contour only) | |
DS_MAT_U | - (workspace) left singular vectors (contour only) | |
DS_MAT_V | - (workspace) right singular vectors (contour only) | |
DS_MAT_W | - (workspace) auxiliary matrix of size nxn |
0 | - Successive Linear Problems (SLP), computes just one eigenpair | |
1 | - Contour integral, computes all eigenvalues inside a region |