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Document DESC%CNV method and MOLD arguments to CDASB and PREC%BUILD

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Salvatore Filippone
2017-12-14 17:09:59 +00:00
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<TITLE>psb_set_mat_default -- Set default storage format</TITLE>
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<TITLE>triu -- Return the upper triangle</TITLE>
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<H3><A NAME="SECTION000421700000000000000">
psb_set_mat_default -- Set default storage format</A>
<H3><A NAME="SECTION000421600000000000000">
triu -- Return the upper triangle</A>
</H3>
<P>
<PRE>
call psb_set_mat_default(a)
call a%triu(u,info[,&amp;
&amp; diag,imin,imax,jmin,jmax,rscale,cscale,l])
</PRE>
<P>
Returns the upper triangular part of submatrix
<code>A(imin:imax,jmin:jmax)</code>, optionally rescaling row/col indices to
the range <code>1:imax-imin+1,1:jmax-jmin+1</code>, and returing the
complementary lower triangle.
<DL>
<DT><STRONG>Type:</STRONG></DT>
<DD>Asynchronous.
@@ -69,10 +70,43 @@ call psb_set_mat_default(a)
<DD>
</DD>
<DT><STRONG>a</STRONG></DT>
<DD>a variable of <code>class(psb_T_base_sparse_mat)</code> requesting
a new default storage format.
<DD>the sparse matrix.
<BR>
Type: required.
A variable of type <code>psb_Tspmat_type</code>.
<BR>
Scope: <B>local</B>.
<BR></DD>
<DT><STRONG>diag</STRONG></DT>
<DD>Include diagonals up to this one; <code>diag=1</code> means the
first superdiagonal, <code>diag=-1</code> means the first subdiagonal.
Default 0.
</DD>
<DT><STRONG>imin,imax,jmin,jmax</STRONG></DT>
<DD>Minimum and maximum row and column indices.
<BR>
Type: optional.
</DD>
<DT><STRONG>rscale,cscale</STRONG></DT>
<DD>Whether to rescale row/column indices.
Type: optional.
</DD>
</DL>
<DL>
<DT><STRONG><B>On Return</B></STRONG></DT>
<DD>
</DD>
<DT><STRONG>u</STRONG></DT>
<DD>A copy of the upper triangle of <code>a</code>.
<BR>
A variable of type <code>psb_Tspmat_type</code>.
</DD>
<DT><STRONG>l</STRONG></DT>
<DD>(optional) A copy of the lower triangle of <code>a</code>.
<BR>
A variable of type <code>psb_Tspmat_type</code>.
</DD>
<DT><STRONG>info</STRONG></DT>
<DD>Return code.
</DD>
</DL>