These are chat archives for elemental/chat

23rd
Jul 2018
Walter Landry
@wlandry
Jul 23 2018 22:04
When I compute only eigenvalues with HermitianEig() with high precision (1024 bits), I get inaccurate results (off by 1e-9). When I compute both eigenvalues and eigenvectors, I get the accurate answer. The matrix is not particularly badly conditioned (condition number = 30). Has anyone else seen this kind of behavior?