Struct xlifepp::EigenSolverSolution

template<class ScalarType, class MV>
struct EigenSolverSolution

Collaboration diagram for xlifepp::EigenSolverSolution:

Struct for storing an eigenproblem solution.

Public Members

SmartPtr<MV> espace

An orthonormal basis for the computed eigenspace.

std::vector<ValueEigenSolver<ScalarType>> evals

The computed eigenvalues.

SmartPtr<MV> evecs

The computed eigenvectors.

std::vector<int> index

An index into evecs to allow compressed storage of eigenvectors for real, non-Hermitian problems.

index has length numVecs, where each entry is 0, +1, or -1. These have the following interpretation:

• index[i] == 0: signifies that the corresponding eigenvector is stored as the i column of evecs. This will usually be the case when ScalarType is complex, an eigenproblem is Hermitian, or a real, non-Hermitian eigenproblem has a real eigenvector.

• index[i] == +1: signifies that the corresponding eigenvector is stored in two vectors: the real part in the i column of evecs and the imaginary part in the i+1 column of evecs.

• index[i] == -1: signifies that the corresponding eigenvector is stored in two vectors: the real part in the i-1 column of evecs and the imaginary part in the i column of evecs

int numVecs

The number of computed eigenpairs.