<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!--Converted with LaTeX2HTML 2018 (Released Feb 1, 2018) --> <HTML> <HEAD> <TITLE>psb_geamaxs -- Generalized Infinity Norm</TITLE> <META NAME="description" CONTENT="psb_geamaxs -- Generalized Infinity Norm"> <META NAME="keywords" CONTENT="userhtml"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META NAME="Generator" CONTENT="LaTeX2HTML v2018"> <META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"> <LINK REL="STYLESHEET" HREF="userhtml.css"> <LINK REL="next" HREF="node58.html"> <LINK REL="previous" HREF="node56.html"> <LINK REL="up" HREF="node52.html"> <LINK REL="next" HREF="node58.html"> </HEAD> <BODY > <DIV CLASS="navigation"><!--Navigation Panel--> <A NAME="tex2html959" HREF="node58.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html955" HREF="node52.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html949" HREF="node56.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html957" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <BR> <B> Next:</B> <A NAME="tex2html960" HREF="node58.html">psb_norm1 1-Norm</A> <B> Up:</B> <A NAME="tex2html956" HREF="node52.html">Computational routines</A> <B> Previous:</B> <A NAME="tex2html950" HREF="node56.html">psb_normi Infinity-Norm</A> <B> <A NAME="tex2html958" HREF="node1.html">Contents</A></B> <BR> <BR></DIV> <!--End of Navigation Panel--> <H2><A NAME="SECTION00055000000000000000"> psb_geamaxs -- Generalized Infinity Norm</A> </H2> <P> This subroutine computes a series of infinity norms on the columns of a dense matrix <SPAN CLASS="MATH"><IMG WIDTH="13" HEIGHT="13" ALIGN="BOTTOM" BORDER="0" SRC="img20.png" ALT="$x$"></SPAN>: <BR><P></P> <DIV ALIGN="CENTER" CLASS="mathdisplay"> <!-- MATH \begin{displaymath} res(i) \leftarrow \max_k |x(k,i)| \end{displaymath} --> <IMG WIDTH="147" HEIGHT="36" BORDER="0" SRC="img34.png" ALT="\begin{displaymath}res(i) \leftarrow \max_k \vert x(k,i)\vert \end{displaymath}"> </DIV> <BR CLEAR="ALL"> <P></P> <P> <PRE> call psb_geamaxs(res, x, desc_a, info) </PRE> <P> <BR><P></P> <DIV ALIGN="CENTER"><A NAME="2027"></A> <TABLE> <CAPTION><STRONG>Table 5:</STRONG> Data types</CAPTION> <TR><TD> <DIV ALIGN="CENTER"> <TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER"> <TR><TD ALIGN="LEFT"><SPAN CLASS="MATH"><IMG WIDTH="27" HEIGHT="13" ALIGN="BOTTOM" BORDER="0" SRC="img29.png" ALT="$res$"></SPAN></TD> <TD ALIGN="LEFT"><SPAN CLASS="MATH"><IMG WIDTH="13" HEIGHT="13" ALIGN="BOTTOM" BORDER="0" SRC="img20.png" ALT="$x$"></SPAN></TD> <TD ALIGN="LEFT"><B>Subroutine</B></TD> </TR> <TR><TD ALIGN="LEFT">Short Precision Real</TD> <TD ALIGN="LEFT">Short Precision Real</TD> <TD ALIGN="LEFT">psb_geamaxs</TD> </TR> <TR><TD ALIGN="LEFT">Long Precision Real</TD> <TD ALIGN="LEFT">Long Precision Real</TD> <TD ALIGN="LEFT">psb_geamaxs</TD> </TR> <TR><TD ALIGN="LEFT">Short Precision Real</TD> <TD ALIGN="LEFT">Short Precision Complex</TD> <TD ALIGN="LEFT">psb_geamaxs</TD> </TR> <TR><TD ALIGN="LEFT">Long Precision Real</TD> <TD ALIGN="LEFT">Long Precision Complex</TD> <TD ALIGN="LEFT">psb_geamaxs</TD> </TR> </TABLE> </DIV> </TD></TR> </TABLE> </DIV><P></P> <BR> <P> <DL> <DT><STRONG>Type:</STRONG></DT> <DD>Synchronous. </DD> <DT><STRONG><B>On Entry</B></STRONG></DT> <DD> </DD> <DT><STRONG>x</STRONG></DT> <DD>the local portion of global dense matrix <SPAN CLASS="MATH"><IMG WIDTH="13" HEIGHT="13" ALIGN="BOTTOM" BORDER="0" SRC="img20.png" ALT="$x$"></SPAN>. <BR> Scope: <B>local</B> <BR> Type: <B>required</B> <BR> Intent: <B>in</B>. <BR> Specified as: a rank one or two array or an object of type vdata<TT>psb_T_vect_type</TT> containing numbers of type specified in Table <A HREF="#tab:f90mamax">5</A>. </DD> <DT><STRONG>desc_a</STRONG></DT> <DD>contains data structures for communications. <BR> Scope: <B>local</B> <BR> Type: <B>required</B> <BR> Intent: <B>in</B>. <BR> Specified as: an object of type descdata<TT>psb_desc_type</TT>. </DD> <DT><STRONG><B>On Return</B></STRONG></DT> <DD> </DD> <DT><STRONG>res</STRONG></DT> <DD>is the infinity norm of the columns of <SPAN CLASS="MATH"><IMG WIDTH="13" HEIGHT="13" ALIGN="BOTTOM" BORDER="0" SRC="img20.png" ALT="$x$"></SPAN>. <BR> Scope: <B>global</B> <BR> Intent: <B>out</B>. <BR> Specified as: a number or a rank-one array of long precision real numbers. </DD> <DT><STRONG>info</STRONG></DT> <DD>Error code. <BR> Scope: <B>local</B> <BR> Type: <B>required</B> <BR> Intent: <B>out</B>. <BR> An integer value; 0 means no error has been detected. </DD> </DL> <P> <DIV CLASS="navigation"><HR> <!--Navigation Panel--> <A NAME="tex2html959" HREF="node58.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html955" HREF="node52.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html949" HREF="node56.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html957" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <BR> <B> Next:</B> <A NAME="tex2html960" HREF="node58.html">psb_norm1 1-Norm</A> <B> Up:</B> <A NAME="tex2html956" HREF="node52.html">Computational routines</A> <B> Previous:</B> <A NAME="tex2html950" HREF="node56.html">psb_normi Infinity-Norm</A> <B> <A NAME="tex2html958" HREF="node1.html">Contents</A></B> </DIV> <!--End of Navigation Panel--> </BODY> </HTML>