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Updated docs with fnd_owner adn set_p_adjcncy

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Salvatore Filippone
2019-12-12 17:37:31 +00:00
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<TITLE>clean_zeros -- Eliminate zero coefficients</TITLE>
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<H3><A NAME="SECTION000421200000000000000">
clean_zeros -- Eliminate zero coefficients</A>
<H3><A NAME="SECTION00042900000000000000">
is_lower, is_upper, is_triangle, is_unit --
Format check</A>
</H3>
<PRE>
call a%clean_zeros(info)
</PRE>
<P>
Eliminates zero coefficients in the input matrix. Note that depending
on the internal storage format, there may still be some amount of
zero padding in the output.
<PRE>
if (a%is_triangle()) then
if (a%is_upper()) then
if (a%is_lower()) then
if (a%is_unit()) then
</PRE>
<P>
<DL>
@@ -70,24 +70,22 @@ zero padding in the output.
<DD>
</DD>
<DT><STRONG>a</STRONG></DT>
<DD>the sparse matrix.
<DD>the sparse matrix
<BR>
A variable of type <code>psb_Tspmat_type</code>.
<BR>
Scope: <B>local</B>.
Scope: <B>local</B>
<BR></DD>
</DL>
<P>
<DL>
<DT><STRONG><B>On Return</B></STRONG></DT>
<DD>
</DD>
<DT><STRONG>a</STRONG></DT>
<DD>The matrix <code>a</code> without zero coefficients.
<BR>
A variable of type <code>psb_Tspmat_type</code>.
</DD>
<DT><STRONG>info</STRONG></DT>
<DD>Return code.
<DT><STRONG>Function value</STRONG></DT>
<DD>A <code>logical</code> value indicating whether the
matrix is triangular; if <code>is_triangle()</code> returns <code>.true.</code>
check also if it is lower, upper and with a unit (i.e. assumed)
diagonal.
</DD>
</DL>