Type Definition linfa_linalg::lobpcg::LobpcgResult
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The result of the eigensolver
In the best case the eigensolver has converged with a result better than the given threshold,
then a Ok gives the eigenvalues, eigenvectors and norms. If an error ocurred
during the process, it is returned in Err (together with the best result),
as it could be of value. If there is no result at all, then the second field is None.
This happens if the algorithm fails in an early stage, for example if the matrix A is not SPD