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Pavel Kus authored
Previously we checked ortonormality of eigenvectors by comparing the matrix S^T * S to identity matrix. The new feature is also checking just the diagonal of the matrix S^T * S. By that we get the information, how far are the eigenvectors from having length 1. If it turns out to be important, we could try to normalize them at the end of elpa, which is simple (in contrast with enforcing better orthogonality).
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