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| author |  Chen-Pang He <jdh8@ms63.hinet.net> | 2013-07-21 01:00:36 +0800 |
|---|---|---|
| committer | Chen-Pang He <jdh8@ms63.hinet.net> | 2013-07-21 01:00:36 +0800 |
| commit | 51573da3a4407288b900e8764e20de4fc09018d3 (patch) | |
| tree | a5a2f49243092de4ae75a83d6ba5444041f3f290 /unsupported/Eigen/MatrixFunctions | |
| parent | 1191949e8725106035d0f7276857217585a115ef (diff) | |
Warn about power of a matrix with non-semisimple 0 eigenvalue.
Diffstat (limited to 'unsupported/Eigen/MatrixFunctions')
| -rw-r--r-- | unsupported/Eigen/MatrixFunctions | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/unsupported/Eigen/MatrixFunctions b/unsupported/Eigen/MatrixFunctions index 41dfab390..ff466a519 100644 --- a/unsupported/Eigen/MatrixFunctions +++ b/unsupported/Eigen/MatrixFunctions @@ -262,6 +262,10 @@ where \f$ T_1 \f$ is invertible. Then \f$ T^p \f$ is given by 0 & 0 \end{array}. \right] \f] +\warning Fractional power of a matrix with a non-semisimple zero +eigenvalue is not well-defined. We introduce an assertion failure +against inaccurate result, e.g. \include MatrixPower_failure.cpp + Details of the algorithm can be found in: Nicholas J. Higham and Lijing Lin, "A Schur-Padé algorithm for fractional powers of a matrix," <em>SIAM J. %Matrix Anal. Applic.</em>, |