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Updated description of DOT and friends to account for optional GLOBAL
var.
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Salvatore Filippone
+72
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@@ -3,8 +3,8 @@
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<!--Converted with LaTeX2HTML 2017.2 (Released Jan 23, 2017) -->
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<HTML>
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<TITLE>Preconditioner routines</TITLE>
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<META NAME="description" CONTENT="Preconditioner routines">
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<TITLE>mm_array_write -- Write a dense array from a file in the MatrixMarket format</TITLE>
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HREF="node125.html">init Initialize</A>
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<B> <A NAME="tex2html1804"
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HREF="node125.html">Preconditioner routines</A>
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HREF="node118.html">Utilities</A>
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HREF="node123.html">mm_mat_write Write</A>
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<B> <A NAME="tex2html1806"
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HREF="node1.html">Contents</A></B>
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<BR>
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<BR></DIV>
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<!--End of Navigation Panel-->
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<H1><A NAME="SECTION000110000000000000000"></A>
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<A NAME="sec:precs"></A>
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<H2><A NAME="SECTION000106000000000000000">
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mm_array_write -- Write a dense array from a
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file in the MatrixMarket format</A>
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</H2>
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ALT="\begin{lstlisting}
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call mm_array_write(b, iret, iunit, filename)
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\end{lstlisting}">
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<BR>
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Preconditioner routines
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</H1>
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<P>
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<A NAME="sec:psprecs"></A>The base PSBLAS library contains the implementation of two simple
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preconditioning techniques:
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<UL>
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<LI>Diagonal Scaling
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</LI>
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<LI>Block Jacobi with ILU(0) factorization
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</LI>
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</UL>
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The supporting data type and subroutine interfaces are defined in the
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module <code>psb_prec_mod</code>.
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The old interfaces <code>psb_precinit</code> and <code>psb_precbld</code> are still supported for
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backward compatibility
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<DL>
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<DT><STRONG>Type:</STRONG></DT>
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<DD>Asynchronous.
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</DD>
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<DT><STRONG><B>On Entry </B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>b</STRONG></DT>
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<DD>Rigth hand side(s).
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<BR>
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Type: <B>required</B>
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<BR>
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An array of type real or complex, rank 1 or 2; will be written.. </DD>
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<DT><STRONG>filename</STRONG></DT>
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<DD>The name of the file to be written.
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<BR>
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Type:<B>optional</B>.
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<BR>
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Specified as: a character variable containing a valid file name, or
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<code>-</code>, in which case the default input unit 5 (i.e. standard input
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in Unix jargon) is used. Default: <code>-</code>.
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</DD>
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<DT><STRONG>iunit</STRONG></DT>
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<DD>The Fortran file unit number.
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<BR>
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Type:<B>optional</B>.
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<BR>
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Specified as: an integer value. Only meaningful if filename is not <code>-</code>.
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</DD>
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</DL>
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<P>
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<BR><HR>
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<!--Table of Child-Links-->
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<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A>
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<DL>
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<DT><STRONG><B>On Return</B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>iret</STRONG></DT>
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<DD>Error code.
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<BR>
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Type: <B>required</B>
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<BR>
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An integer value; 0 means no error has been detected.
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</DD>
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</DL>
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<UL CLASS="ChildLinks">
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<LI><A NAME="tex2html1807"
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HREF="node125.html">init -- Initialize a preconditioner</A>
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<LI><A NAME="tex2html1808"
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HREF="node126.html">build -- Builds a preconditioner</A>
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<LI><A NAME="tex2html1809"
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HREF="node127.html">apply -- Preconditioner application
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routine</A>
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<LI><A NAME="tex2html1810"
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HREF="node128.html">descr -- Prints a description of current
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preconditioner</A>
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<LI><A NAME="tex2html1811"
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HREF="node129.html">clone -- clone current
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preconditioner</A>
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<LI><A NAME="tex2html1812"
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HREF="node130.html">free -- Free a preconditioner</A>
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</UL>
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<!--End of Table of Child-Links-->
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<P>
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<BR><HR>
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