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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="KSPSetDiagonalScaleFix"><H1>KSPSetDiagonalScaleFix</H1></A>
Tells <A HREF="../KSP/KSP.html#KSP">KSP</A> to diagonally scale the system back after solving.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscksp.h"
PetscErrorCode KSPSetDiagonalScaleFix(KSP ksp,PetscBool fix)
</PRE>
Logically Collective on <A HREF="../KSP/KSP.html#KSP">KSP</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ksp </B></TD><TD>- the <A HREF="../KSP/KSP.html#KSP">KSP</A> context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>fix </B></TD><TD>- <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> to scale back after the system solve, <A HREF="../Sys/PETSC_FALSE.html#PETSC_FALSE">PETSC_FALSE</A> to not
rescale (default)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Must be called after <A HREF="../KSP/KSPSetDiagonalScale.html#KSPSetDiagonalScale">KSPSetDiagonalScale</A>()
<P>
Using this will slow things down, because it rescales the matrix before and
after each linear solve. This is intended mainly for testing to allow one
to easily get back the original system to make sure the solution computed is
accurate enough.
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../KSP/KSP.html#KSP">KSP</A>, set, options, prefix, database
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../KSP/KSPGetDiagonalScale.html#KSPGetDiagonalScale">KSPGetDiagonalScale</A>(), <A HREF="../KSP/KSPSetDiagonalScale.html#KSPSetDiagonalScale">KSPSetDiagonalScale</A>(), <A HREF="../KSP/KSPGetDiagonalScaleFix.html#KSPGetDiagonalScaleFix">KSPGetDiagonalScaleFix</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/ksp/interface/itfunc.c.html#KSPSetDiagonalScaleFix">src/ksp/ksp/interface/itfunc.c</A>
<BR><A HREF="./index.html">Index of all KSP routines</A>
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