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psblas3:
fix documentation bug for NRM2
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<!--Converted with LaTeX2HTML 2002-2-1 (1.71)
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<!--Converted with LaTeX2HTML 2008 (1.71)
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original version by: Nikos Drakos, CBLU, University of Leeds
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* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan
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* with significant contributions from:
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Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
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<HTML>
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<HEAD>
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<TITLE>psb_precinit -- Initialize a preconditioner</TITLE>
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<META NAME="description" CONTENT="psb_precinit -- Initialize a preconditioner">
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<TITLE>About this document ...</TITLE>
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HREF="node108.html">psb_precbld Builds</A>
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HREF="node106.html">Preconditioner routines</A>
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<B> <A NAME="tex2html1461"
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HREF="node106.html">Bibliography</A>
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<B> <A NAME="tex2html1513"
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HREF="node1.html">Contents</A></B>
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<BR>
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<BR>
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<!--End of Navigation Panel-->
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<H1><A NAME="SECTION000840000000000000000">
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psb_precinit -- Initialize a preconditioner</A>
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<H1><A NAME="SECTION000140000000000000000">
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About this document ...</A>
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</H1>
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<P>
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This document was generated using the
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<A HREF="http://www.latex2html.org/"><STRONG>LaTeX</STRONG>2<tt>HTML</tt></A> translator Version 2008 (1.71)
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<P>
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ifstarssyntaxsyntaxcall psb_precinitprec, ptype, info
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Copyright © 1993, 1994, 1995, 1996,
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<A HREF="http://cbl.leeds.ac.uk/nikos/personal.html">Nikos Drakos</A>,
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Computer Based Learning Unit, University of Leeds.
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<BR>
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Copyright © 1997, 1998, 1999,
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<A HREF="http://www.maths.mq.edu.au/~ross/">Ross Moore</A>,
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Mathematics Department, Macquarie University, Sydney.
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<P>
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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>ptype</STRONG></DT>
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<DD>the type of preconditioner.
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Scope: <B>global</B>
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<BR>
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Type: <B>required</B>
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<BR>
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Intent: <B>in</B>.
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<BR>
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Specified as: a character string, see usage notes.
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</DD>
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<DT><STRONG><B>On Exit</B></STRONG></DT>
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<DD><P>
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</DD>
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<DT><STRONG>prec</STRONG></DT>
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<DD>Scope: <B>local</B>
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<BR>
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Type: <B>required</B>
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<BR>
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Intent: <B>inout</B>.
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<BR>
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Specified as: a preconditioner data structure precdata<TT>psb_prec_type</TT>.
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</DD>
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<DT><STRONG>info</STRONG></DT>
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<DD>Scope: <B>global</B>
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<BR>
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Type: <B>required</B>
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<BR>
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Intent: <B>out</B>.
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<BR>
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Error code: if no error, 0 is returned.
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</DD>
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</DL>
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<FONT SIZE="+1"><B>Notes</B></FONT>
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Legal inputs to this subroutine are interpreted depending on the
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<IMG
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WIDTH="42" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
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SRC="img135.png"
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ALT="$ptype$"> string as follows<A NAME="tex2html28"
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HREF="footnode.html#foot6821"><SUP>3</SUP></A>:
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<DL>
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<DT><STRONG>NONE</STRONG></DT>
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<DD>No preconditioning, i.e. the preconditioner is just a copy
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operator.
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</DD>
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<DT><STRONG>DIAG</STRONG></DT>
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<DD>Diagonal scaling; each entry of the input vector is
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multiplied by the reciprocal of the sum of the absolute values of
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the coefficients in the corresponding row of matrix <IMG
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WIDTH="16" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
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SRC="img1.png"
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ALT="$A$">;
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</DD>
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<DT><STRONG>BJAC</STRONG></DT>
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<DD>Precondition by a factorization of the
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block-diagonal of matrix <IMG
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WIDTH="16" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
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SRC="img1.png"
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ALT="$A$">, where block boundaries are determined
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by the data allocation boundaries for each process; requires no
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communication. Only the incomplete factorization <IMG
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WIDTH="56" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
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SRC="img136.png"
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ALT="$ILU(0)$"> is
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currently implemented.
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</DD>
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</DL>
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The command line arguments were: <BR>
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<STRONG>latex2html</STRONG> <TT>-local_icons -noaddress -dir ../../html userhtml.tex</TT>
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<P>
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The translation was initiated by on 2010-06-22
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<BR><HR>
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