@ -65,13 +65,7 @@ This method allocates and initializes the preconditioner
\end { tabular}
\vskip 1.5\baselineskip
For compatibility with the previous versions of MLD2P4, this method can be also invoked
as follows:
\begin { center}
\verb |call amg_ precinit(p,ptype,info)|
\end { center}
\clearpage
@ -132,13 +126,6 @@ contained in \verb|val|.
underlying objects.
\end { tabular}
\vskip 1.5\baselineskip
For compatibility with the previous versions of MLD2P4, this method can be also invoked
as follows:
\begin { center}
\verb |call amg_ precset(p,what,val,info)|
\end { center}
\noindent
However, in this case the optional arguments \verb |ilev|,
@ -238,13 +225,9 @@ See also Sec.~\ref{sec:adding}.
\verb |what| & \textsc { data type} & \verb |val| & \textsc { default} &
\textsc { comments} \\ \hline
\verb |'ML_ CYCLE'| & \verb |character(len=*)|
& \texttt { 'VCYCLE'} \par \texttt { 'WCYCLE'} \par \texttt { 'KCYCLE'} \par
\texttt { 'MULT'} \par \texttt { 'ADD'}
& \texttt { 'VCYCLE'} \par \texttt { 'WCYCLE'} \par \texttt { 'KCYCLE'} \par \texttt { 'ADD'}
& \texttt { 'VCYCLE'}
& Multilevel cycle: V-cycle, W-cycle, K-cycle, hybrid Multiplicative Schwarz,
and Additive Schwarz. \par
Note that hybrid Multiplicative Schwarz is equivalent to V-cycle and
is included for compatibility with previous versions of MLD2P4. \\ \hline
& Multilevel cycle: V-cycle, W-cycle, K-cycle, and additive composition. \\ \hline
\verb |'OUTER_ SWEEPS'| & \texttt { integer} &
Any integer \par number $ \ge 1 $ & 1 &
Number of multilevel cycles. \\ \hline
@ -290,7 +273,7 @@ be applied.
if the number of levels reaches this value (see Note). \\ \hline
\verb |'PAR_ AGGR_ ALG'| & \verb |character(len=*)| \hspace * { -3mm}
& \texttt { 'DEC'} , \texttt { 'SYMDEC'}
& \texttt { 'DEC'} , \texttt { 'SYMDEC'} , \texttt { 'COUPLED'}
& \texttt { 'DEC'}
& Parallel aggregation algorithm. \par Currently, only the
decoupled aggregation (\verb |DEC|) is available; the
@ -301,7 +284,8 @@ be applied.
\verb |'AGGR_ TYPE'| & \verb |character(len=*)| \hspace * { -3mm}
& \textbf { \texttt { 'SOC1'} } &
\textbf { \texttt { 'SOC1'} } ,
\textbf { \texttt { 'SOC2'} }
\textbf { \texttt { 'SOC2'} } ,
\textbf { \texttt { 'MATCHBOXP'} }
& Type of aggregation algorithm: currently,
we implement to measures of strength of
connection, the one by Van\v { e} k, Mandel
@ -582,7 +566,7 @@ made by the user through the methods \verb|init| and \verb|set|.
& The sparse matrix structure containing the local part of the
matrix to be preconditioned. Note that \emph { x} must be chosen according
to the real/complex,
single/double precision version of MLD2P4 under use.
single/double precision version of AMG4PSBLAS under use.
See the PSBLAS User's Guide for details \cite { PSBLASGUIDE} .\\
\verb |desc_ a| & \verb |type(psb_ desc_ type), intent(in)|. \\
& The communication descriptor of \verb |a|. See the PSBLAS User's Guide for
@ -615,7 +599,7 @@ hierarchy produced by a previous call to \verb|hierarchy_build|
\verb |a| & \verb |type(psb_ |\emph { x} \verb |spmat_ type), intent(in)|. \\
& The sparse matrix structure containing the local part of the
matrix to be preconditioned. Note that \emph { x} must be chosen according
to the real/complex, single/double precision version of MLD2P4 under use.
to the real/complex, single/double precision version of AMG4PSBLAS under use.
See the PSBLAS User's Guide for details \cite { PSBLASGUIDE} .\\
\verb |desc_ a| & \verb |type(psb_ desc_ type), intent(in)|. \\
& The communication descriptor of \verb |a|. See the PSBLAS User's Guide for
@ -659,7 +643,7 @@ unnatural when dealing with simple one-level preconditioners.
\verb |a| & \verb |type(psb_ |\emph { x} \verb |spmat_ type), intent(in)|. \\
& The sparse matrix structure containing the local part of the
matrix to be preconditioned. Note that \emph { x} must be chosen according
to the real/complex, single/double precision version of MLD2P4 under use.
to the real/complex, single/double precision version of AMG4PSBLAS under use.
See the PSBLAS User's Guide for details \cite { PSBLASGUIDE} .\\
\verb |desc_ a| & \verb |type(psb_ desc_ type), intent(in)|. \\
& The communication descriptor of \verb |a|. See the PSBLAS User's Guide for
@ -679,13 +663,6 @@ unnatural when dealing with simple one-level preconditioners.
components; this allows e.g. running on GPUs. \\
\end { tabular}
\vskip 1.5\baselineskip
For compatibility with the previous versions of MLD2P4, this method can be also invoked
as follows:
\begin { center}
\verb |call amg_ precbld(p,what,val,info[,amold,vmold,imold])|
\end { center}
\noindent
The method can be used to build multilevel preconditioners too.
@ -703,7 +680,7 @@ This method computes $y = op(B^{-1})\, x$, where $B$ is a previously built
preconditioner, stored into \verb |p|, and $ op $
denotes the preconditioner itself or its transpose, according to
the value of \verb |trans|.
Note that, when MLD2P4 is used with a Krylov solver from PSBLAS,
Note that, when AMG4PSBLAS is used with a Krylov solver from PSBLAS,
\verb |p% apply| is called within the PSBLAS method \verb |psb_ krylov|
and hence it is completely transparent to the user.
@ -713,11 +690,11 @@ and hence it is completely transparent to the user.
\verb |x| & \emph { type} \verb |(|\emph { kind\_ parameter} \verb |), dimension(:), intent(in)|.\\
& The local part of the vector $ x $ . Note that \emph { type} and
\emph { kind\_ parameter} must be chosen according
to the real/complex, single/double precision version of MLD2P4 under use.\\
to the real/complex, single/double precision version of AMG4PSBLAS under use.\\
\verb |y| & \emph { type} \verb |(|\emph { kind\_ parameter} \verb |), dimension(:), intent(out)|.\\
& The local part of the vector $ y $ . Note that \emph { type} and
\emph { kind\_ parameter} must be chosen according
to the real/complex, single/double precision version of MLD2P4 under use.\\
to the real/complex, single/double precision version of AMG4PSBLAS under use.\\
\verb |desc_ a| & \verb |type(psb_ desc_ type), intent(in)|. \\
& The communication descriptor associated to the matrix to be
preconditioned.\\
@ -732,16 +709,9 @@ and hence it is completely transparent to the user.
& Workspace. Its size should be at
least \verb |4 * psb_ cd_ get_ local_ | \verb |cols(desc_ a)| (see the PSBLAS User's Guide).
Note that \emph { type} and \emph { kind\_ parameter} must be chosen according
to the real/complex, single/double precision version of MLD2P4 under use.\\
to the real/complex, single/double precision version of AMG4PSBLAS under use.\\
\end { tabular}
\vskip 1.5\baselineskip
For compatibility with the previous versions of MLD2P4, this method can be also invoked
as follows:
\begin { center}
\verb |call amg_ precaply(p,what,val,info)|
\end { center}
\clearpage
@ -761,14 +731,6 @@ This method deallocates the preconditioner data structure \verb|p|.
& Error code. If no error, 0 is returned. See Section~\ref { sec:errors} for details.\\
\end { tabular}
\vskip 1.5\baselineskip
For compatibility with the previous versions of MLD2P4, this method can be also invoked
as follows:
\begin { center}
\verb |call amg_ precfree(p,info)|
\end { center}
\clearpage
@ -793,14 +755,6 @@ or \verb|build|, have been called.
will be printed; the default is the standard output.\\
\end { tabular}
\vskip 1.5\baselineskip
For compatibility with the previous versions of MLD2P4, this method can be also invoked
as follows:
\begin { center}
\verb |call amg_ precdescr(p,info [,iout])|
\end { center}
\subsection { Auxiliary Methods\label { sec:auxil} }
Various functionalities are implemented as additional methods of the
@ -843,7 +797,7 @@ Create a (deep) copy of the preconditioner object.
\verb |pout| & \verb |type(amg_ |\emph { x} \verb |prec_ type), intent(out)|.\\
& The copy of the preconditioner data structure. Note
that \emph { x} must be chosen according
to the real/complex, single/double precision version of MLD2P4 under use.\\
to the real/complex, single/double precision version of AMG4PSBLAS under use.\\
\verb |info| & \verb |integer, intent(out)|.\\
& Error code. If no error, 0 is returned. See Section~\ref { sec:errors} for details.\\
\end { tabular}
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