<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!--Converted with LaTeX2HTML 2012 (1.2) original version by: Nikos Drakos, CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --> <HTML> <HEAD> <TITLE>Subroutine mld_precbld</TITLE> <META NAME="description" CONTENT="Subroutine mld_precbld"> <META NAME="keywords" CONTENT="userhtml"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META NAME="Generator" CONTENT="LaTeX2HTML v2012"> <META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"> <LINK REL="STYLESHEET" HREF="userhtml.css"> <LINK REL="next" HREF="node20.html"> <LINK REL="previous" HREF="node18.html"> <LINK REL="up" HREF="node16.html"> <LINK REL="next" HREF="node20.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html304" HREF="node20.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html300" HREF="node16.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html294" HREF="node18.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html302" HREF="node2.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <BR> <B> Next:</B> <A NAME="tex2html305" HREF="node20.html">Subroutine mld_hierarchy_bld</A> <B> Up:</B> <A NAME="tex2html301" HREF="node16.html">User Interface</A> <B> Previous:</B> <A NAME="tex2html295" HREF="node18.html">Subroutine mld_precset</A> <B> <A NAME="tex2html303" HREF="node2.html">Contents</A></B> <BR> <BR> <!--End of Navigation Panel--> <H2><A NAME="SECTION00083000000000000000"></A><A NAME="sec:precbld"></A> <BR> Subroutine mld_precbld </H2> <P> <DIV ALIGN="CENTER"> <code>mld_precbld(a,desc_a,p,info)</code> <BR> </DIV> <P> This routine builds the preconditioner according to the requirements made by the user through the routines <code>mld_precinit</code> and <code>mld_precset</code>. <P> For multilevel preconditioner this routine is supported for backward compatibility, but we recommend to use the routines of Sec. <A HREF="node20.html#sec:hier_bld">6.4</A> and <A HREF="node21.html#sec:ml_prec_bld">6.5</A>. <FONT SIZE="+1"><B>Arguments</B></FONT> <P> <TABLE CELLPADDING=3> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34><code>a</code></TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340><code>type(psb_</code><I>x</I><code>spmat_type), intent(in)</code>.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34> </TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340>The sparse matrix structure containing the local part of the matrix to be preconditioned. Note that <I>x</I> must be chosen according to the real/complex, single/double precision version of MLD2P4 under use. See the PSBLAS User's Guide for details [<A HREF="node27.html#PSBLASGUIDE">16</A>].</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34><code>desc_a</code></TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340><code>type(psb_desc_type), intent(in)</code>.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34> </TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340>The communication descriptor of <code>a</code>. See the PSBLAS User's Guide for details [<A HREF="node27.html#PSBLASGUIDE">16</A>].</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34><code>p</code></TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340><code>type(mld_</code><I>x</I><code>prec_type), intent(inout)</code>.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34> </TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340>The preconditioner data structure. Note that <I>x</I> must be chosen according to the real/complex, single/double precision version of MLD2P4 under use.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34><code>info</code></TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340><code>integer, intent(out)</code>.</TD> </TR> <TR><TD ALIGN="LEFT" VALIGN="TOP" WIDTH=34> </TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=340>Error code. If no error, 0 is returned. See Section <A HREF="node25.html#sec:errors">7</A> for details.</TD> </TR> </TABLE> <P> <HR> <!--Navigation Panel--> <A NAME="tex2html304" HREF="node20.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html300" HREF="node16.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html294" HREF="node18.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html302" HREF="node2.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <BR> <B> Next:</B> <A NAME="tex2html305" HREF="node20.html">Subroutine mld_hierarchy_bld</A> <B> Up:</B> <A NAME="tex2html301" HREF="node16.html">User Interface</A> <B> Previous:</B> <A NAME="tex2html295" HREF="node18.html">Subroutine mld_precset</A> <B> <A NAME="tex2html303" HREF="node2.html">Contents</A></B> <!--End of Navigation Panel--> </BODY> </HTML>