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Added entrywise inversion and documentation for vec-vec operation

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cirdans-home
2019-11-21 13:56:22 +01:00
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<!--Converted with LaTeX2HTML 2018 (Released Feb 1, 2018) -->
<HTML>
<HEAD>
<TITLE>psb_get_boundary -- Extract list of boundary elements</TITLE>
<META NAME="description" CONTENT="psb_get_boundary -- Extract list of boundary elements">
<TITLE>psb_owned_index -- </TITLE>
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<H2><A NAME="SECTION000723000000000000000">
psb_get_boundary -- Extract list of boundary
elements</A>
<H2><A NAME="SECTION000720000000000000000">
psb_owned_index -- </A>
</H2>
<P>
<PRE>
call psb_get_boundary(bndel, desc, info)
call psb_owned_index(y, x, desc_a, info)
</PRE>
<P>
@@ -66,7 +65,18 @@ call psb_get_boundary(bndel, desc, info)
<DT><STRONG><B>On Entry</B></STRONG></DT>
<DD>
</DD>
<DT><STRONG>desc</STRONG></DT>
<DT><STRONG>x</STRONG></DT>
<DD>Integer indices.
<BR>
Scope: <B>local</B>
<BR>
Type: <B>required</B>
<BR>
Intent: <B>in, inout</B>.
<BR>
Specified as: a scalar or a rank one integer array.
<BR></DD>
<DT><STRONG>desc_a</STRONG></DT>
<DD>the communication descriptor.
<BR>
Scope:<B>local</B>.
@@ -77,6 +87,17 @@ Intent: <B>in</B>.
<BR>
Specified as: a structured data of type descdata<TT>psb_desc_type</TT>.
</DD>
<DT><STRONG>iact</STRONG></DT>
<DD>specifies action to be taken in case of range errors.
Scope: <B>global</B>
<BR>
Type: <B>optional</B>
<BR>
Intent: <B>in</B>.
<BR>
Specified as: a character variable <code>I</code>gnore, <code>W</code>arning or
<code>A</code>bort, default <code>I</code>gnore.
</DD>
</DL>
<P>
@@ -84,19 +105,20 @@ Specified as: a structured data of type descdata<TT>psb_desc_type</TT>.
<DT><STRONG><B>On Return</B></STRONG></DT>
<DD>
</DD>
<DT><STRONG>bndel</STRONG></DT>
<DD>The list of boundary elements on the calling process, in
local numbering.
<BR>
<DT><STRONG>y</STRONG></DT>
<DD>A logical mask which is true for all corresponding entries of
<SPAN CLASS="MATH"><IMG
WIDTH="13" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
SRC="img20.png"
ALT="$x$"></SPAN> that are owned by the current process
Scope: <B>local</B>
<BR>
Type: <B>required</B>
<BR>
Intent: <B>out</B>.
<BR>
Specified as: a rank one array with the ALLOCATABLE
attribute, of type integer.
<BR></DD>
Specified as: a scalar or rank one logical array.
</DD>
<DT><STRONG>info</STRONG></DT>
<DD>Error code.
<BR>
@@ -114,12 +136,9 @@ An integer value; 0 means no error has been detected.
<BIG CLASS="LARGE"><B>Notes</B></BIG>
<OL>
<LI>If there are no boundary elements (i.e., if the local part of
the connectivity graph is self-contained) the output vector is set
to the &ldquo;not allocated&rdquo; state.
</LI>
<LI>Otherwise the size of <code>bndel</code> will be exactly equal to the
number of boundary elements.
<LI>This routine returns a <code>.true.</code> value for those indices
that are strictly owned by the current process, excluding the halo
indices
</LI>
</OL>