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Fixed proposal for aggr_omega_Alg aggr_omega_val.
This commit is contained in:
Salvatore Filippone
2008-07-24 14:31:55 +00:00
parent 52a2ea5214
commit c91a8888b3
32 changed files with 794 additions and 675 deletions
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docs/src/userinterface.tex
+17 -11
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@@ -234,22 +234,28 @@ refer to Section~\ref{sec:background}.
& Any~real~num. $\in [0, 1]$
& 0
& Threshold $\theta$ in the aggregation algorithm. \\ \hline
\verb|mld_aggr_omega_alg_| & \verb|character(len=*)|
& \texttt{'USER\_CHOICE'} \hspace{2.5cm} \texttt{'EIG\_EST'}
& \texttt{'EIG\_EST'}
& How the damping parameter $\omega$ in the
smoothed aggregation should be computed:
either via an estimate of the eigenvalue
$D^{-1}A$ with largest modulus, or explicily
specified by the user. \\ \hline
\verb|mld_aggr_eig_| & \verb|character(len=*)|
& \texttt{'A\_NORMI'}
& \texttt{'A\_NORMI'}
& Estimate of the eigenvalue $D^{-1}A$ with largest modulus,
to build the damping parameter $\omega$ in the smoothed aggregation.
Currently, only the infinity norm of
the matrix is available. \\ \hline
& How to estimate the eigenvalue $D^{-1}A$ with largest modulus.
Currently only the infinity norm estimate
is available. \\ \hline
\verb|mld_aggr_damp_| & \verb|real(|\emph{kind\_parameter}\verb|)|
& Any~real~num.
& $4/(3||D^{-1}A||_\infty)$
& Any~nonnegative~real~num.
& $4/(3|\lambda_{max}(D^{-1}A)|)$
& Damping parameter $\omega$ in the smoothed aggregation algorithm.
If the user specifies a negative value, then $\omega$
is set to its default value;
otherwise, $\omega$ is set to the value provided by the
user. In the latter case no estimate of the eigenvalue of
$D^{-1}A$ with largest modulus is computed.\\
Must be set by the user if
\verb|USER_CHOICE| was specified for
\verb|mld_aggr_omega_alg_|,
otherwise it is computed by the library.\\
\hline
\end{tabular}
\end{center}