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<div id="version" align=right><b>slepc-3.23.1 2025-05-01</b></div>
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<H1>DSSetExtraRow</H1>
Sets a flag to indicate that the matrix has one extra row.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcds.h"
<A HREF="https://petsc.org/release/manualpages/Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../DS/DSSetExtraRow.html#DSSetExtraRow">DSSetExtraRow</A>(<A HREF="../DS/DS.html#DS">DS</A> ds,<A HREF="https://petsc.org/release/manualpages/Sys/PetscBool.html#PetscBool">PetscBool</A> ext)
</PRE>
Logically Collective
<P>
<H3><FONT COLOR="#883300">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ds </B></TD><TD> - the direct solver context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ext </B></TD><TD> - a boolean flag
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
In Krylov methods it is useful that the matrix representing the direct solver
has one extra row, i.e., has dimension (n+1) x n. If this flag is activated, all
transformations applied to the right of the matrix also affect this additional
row. In that case, (n+1) must be less or equal than the leading dimension.
<P>
The default is <A HREF="https://petsc.org/release/manualpages/Sys/PETSC_FALSE.html#PETSC_FALSE">PETSC_FALSE</A>.
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../DS/DSSolve.html#DSSolve">DSSolve</A>(), <A HREF="../DS/DSAllocate.html#DSAllocate">DSAllocate</A>(), <A HREF="../DS/DSGetExtraRow.html#DSGetExtraRow">DSGetExtraRow</A>()
<BR><P><B></B><H3><FONT COLOR="#883300">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#883300">Location</FONT></H3>
</B><A HREF="../../../src/sys/classes/ds/interface/dsbasic.c.html#DSSetExtraRow">src/sys/classes/ds/interface/dsbasic.c</A>
<BR><BR><A HREF="./index.html">Index of all DS routines</A>
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