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Use it in GENPDE. Update docs
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Salvatore Filippone
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@@ -7,8 +7,8 @@ original version by: Nikos Drakos, CBLU, University of Leeds
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Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
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<TITLE>psb_geaxpby -- General Dense Matrix Sum</TITLE>
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<B> <A NAME="tex2html831"
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HREF="node49.html">psb_geaxpby General</A>
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HREF="node47.html">Preconditioner data structure</A>
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<B> <A NAME="tex2html821"
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HREF="node1.html">Contents</A></B>
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<!--End of Navigation Panel-->
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<H2><A NAME="SECTION00051000000000000000">
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psb_geaxpby -- General Dense Matrix Sum</A>
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</H2>
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<H1><A NAME="SECTION00050000000000000000">
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Computational routines</A>
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</H1>
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<P>
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This subroutine is an interface to the computational kernel for
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dense matrix sum:
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<BR><P></P>
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<DIV ALIGN="CENTER">
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<!-- MATH
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\begin{displaymath}
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y \leftarrow \alpha\> x+ \beta y
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\end{displaymath}
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-->
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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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<IMG
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WIDTH="93" HEIGHT="27" BORDER="0"
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SRC="img19.png"
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ALT="\begin{displaymath}y \leftarrow \alpha\> x+ \beta y \end{displaymath}">
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</DIV>
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<BR CLEAR="ALL">
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<P></P>
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<P>
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<PRE>
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call psb_geaxpby(alpha, x, beta, y, desc_a, info)
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</PRE>
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<P>
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<BR><P></P>
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<DIV ALIGN="CENTER"><A NAME="1813"></A>
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<TABLE>
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<CAPTION><STRONG>Table 1:</STRONG>
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Data types</CAPTION>
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<TR><TD>
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<DIV ALIGN="CENTER">
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<TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER">
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<TR><TD ALIGN="LEFT"><IMG
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WIDTH="14" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img20.png"
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ALT="$x$">, <IMG
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WIDTH="13" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
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SRC="img21.png"
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ALT="$y$">, <IMG
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WIDTH="14" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img22.png"
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ALT="$\alpha$">, <IMG
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WIDTH="14" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
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SRC="img23.png"
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ALT="$\beta$"></TD>
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<TD ALIGN="LEFT"><B>Subroutine</B></TD>
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</TR>
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<TR><TD ALIGN="LEFT">Short Precision Real</TD>
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<TD ALIGN="LEFT">psb_geaxpby</TD>
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</TR>
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<TR><TD ALIGN="LEFT">Long Precision Real</TD>
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<TD ALIGN="LEFT">psb_geaxpby</TD>
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</TR>
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<TR><TD ALIGN="LEFT">Short Precision Complex</TD>
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<TD ALIGN="LEFT">psb_geaxpby</TD>
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</TR>
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<TR><TD ALIGN="LEFT">Long Precision Complex</TD>
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<TD ALIGN="LEFT">psb_geaxpby</TD>
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</TR>
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</TABLE>
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</DIV>
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</TD></TR>
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</TABLE>
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</DIV><P></P>
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<BR>
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<P>
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<DL>
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<DT><STRONG>Type:</STRONG></DT>
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<DD>Synchronous.
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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>alpha</STRONG></DT>
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<DD>the scalar <IMG
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WIDTH="14" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img22.png"
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ALT="$\alpha$">.
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<BR>
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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 number of the data type indicated in Table <A HREF="#tab:f90axpby">1</A>.
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</DD>
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<DT><STRONG>x</STRONG></DT>
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<DD>the local portion of global dense matrix
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<IMG
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WIDTH="14" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img20.png"
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ALT="$x$">.
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<BR>
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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>in</B>.
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<BR>
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Specified as: a rank one or two array or an object of type vdata<TT>psb_T_vect_type</TT>
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containing numbers of type
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specified in Table <A HREF="#tab:f90axpby">1</A>. The rank of <IMG
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WIDTH="14" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img20.png"
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ALT="$x$"> must be the same of <IMG
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WIDTH="13" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
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SRC="img21.png"
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ALT="$y$">.
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</DD>
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<DT><STRONG>beta</STRONG></DT>
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<DD>the scalar <IMG
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WIDTH="14" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
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SRC="img23.png"
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ALT="$\beta$">.
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<BR>
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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 number of the data type indicated in Table <A HREF="#tab:f90axpby">1</A>.
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</DD>
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<DT><STRONG>y</STRONG></DT>
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<DD>the local portion of the global dense matrix
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<IMG
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WIDTH="13" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
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SRC="img21.png"
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ALT="$y$">.
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<BR>
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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 rank one or two array or an object of type vdata<TT>psb_T_vect_type</TT> containing numbers of the type
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indicated in Table <A HREF="#tab:f90axpby">1</A>. The rank of <IMG
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WIDTH="13" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
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SRC="img21.png"
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ALT="$y$"> must be the same of <IMG
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WIDTH="14" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img20.png"
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ALT="$x$">.
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</DD>
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<DT><STRONG>desc_a</STRONG></DT>
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<DD>contains data structures for communications.
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<BR>
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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>in</B>.
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<BR>
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Specified as: an object of type descdata<TT>psb_desc_type</TT>.
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<P>
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</DD>
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</DL>
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<P>
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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>y</STRONG></DT>
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<DD>the local portion of result submatrix <IMG
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WIDTH="13" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
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SRC="img21.png"
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ALT="$y$">.
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<BR>
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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 rank one or two array or an object of type vdata<TT>psb_T_vect_type</TT> containing numbers of the type
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indicated in Table <A HREF="#tab:f90axpby">1</A>.
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</DD>
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<DT><STRONG>info</STRONG></DT>
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<DD>Error code.
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<BR>
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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>out</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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<P>
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<HR>
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<UL>
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<LI><A NAME="tex2html824"
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HREF="node49.html">psb_geaxpby -- General Dense Matrix Sum</A>
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<LI><A NAME="tex2html825"
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HREF="node50.html">psb_gedot -- Dot Product</A>
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<LI><A NAME="tex2html826"
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HREF="node51.html">psb_gedots -- Generalized Dot Product</A>
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<LI><A NAME="tex2html827"
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HREF="node52.html">psb_normi -- Infinity-Norm of Vector</A>
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<LI><A NAME="tex2html828"
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HREF="node53.html">psb_geamaxs -- Generalized Infinity Norm</A>
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<LI><A NAME="tex2html829"
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HREF="node54.html">psb_norm1 -- 1-Norm of Vector</A>
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<LI><A NAME="tex2html830"
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HREF="node55.html">psb_geasums -- Generalized 1-Norm of Vector</A>
|
||||
<LI><A NAME="tex2html831"
|
||||
HREF="node56.html">psb_norm2 -- 2-Norm of Vector</A>
|
||||
<LI><A NAME="tex2html832"
|
||||
HREF="node57.html">psb_genrm2s -- Generalized 2-Norm of Vector</A>
|
||||
<LI><A NAME="tex2html833"
|
||||
HREF="node58.html">psb_norm1 -- 1-Norm of Sparse Matrix</A>
|
||||
<LI><A NAME="tex2html834"
|
||||
HREF="node59.html">psb_normi -- Infinity Norm of Sparse Matrix</A>
|
||||
<LI><A NAME="tex2html835"
|
||||
HREF="node60.html">psb_spmm -- Sparse Matrix by Dense Matrix
|
||||
Product</A>
|
||||
<LI><A NAME="tex2html836"
|
||||
HREF="node61.html">psb_spsm -- Triangular System Solve</A>
|
||||
</UL>
|
||||
<!--End of Table of Child-Links-->
|
||||
<BR><HR>
|
||||
|
||||
</BODY>
|
||||
</HTML>
|
||||
|
||||
Reference in New Issue
Block a user