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<div id="version" align=right><b>petsc-3.10.3 2018-12-18</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.10.3 v3.10.3 docs/manualpages/KSP/KSP_NORM_NATURAL.html "><small>Report Typos and Errors</small></a></div>
<A NAME="KSP_NORM_NATURAL"><H1>KSP_NORM_NATURAL</H1></A>
Compute the 'natural norm' of residual sqrt((b - A*x)*B*(b - A*x)) and pass that to the convergence test routine. This is only supported by <A HREF="../KSP/KSPCG.html#KSPCG">KSPCG</A>, <A HREF="../KSP/KSPCR.html#KSPCR">KSPCR</A>, <A HREF="../KSP/KSPCGNE.html#KSPCGNE">KSPCGNE</A>, <A HREF="../KSP/KSPCGS.html#KSPCGS">KSPCGS</A>, <A HREF="../KSP/KSPFCG.html#KSPFCG">KSPFCG</A>, <A HREF="../KSP/KSPPIPEFCG.html#KSPPIPEFCG">KSPPIPEFCG</A>, <A HREF="../KSP/KSPPIPEGCR.html#KSPPIPEGCR">KSPPIPEGCR</A>
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<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../KSP/KSPNormType.html#KSPNormType">KSPNormType</A>, <A HREF="../KSP/KSPSetNormType.html#KSPSetNormType">KSPSetNormType</A>(), <A HREF="../KSP/KSP_NORM_NONE.html#KSP_NORM_NONE">KSP_NORM_NONE</A>, <A HREF="../KSP/KSP_NORM_PRECONDITIONED.html#KSP_NORM_PRECONDITIONED">KSP_NORM_PRECONDITIONED</A>, <A HREF="../KSP/KSP_NORM_UNPRECONDITIONED.html#KSP_NORM_UNPRECONDITIONED">KSP_NORM_UNPRECONDITIONED</A>, <A HREF="../KSP/KSPSetConvergenceTest.html#KSPSetConvergenceTest">KSPSetConvergenceTest</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/ksp/ksp/guess/../../../../include/petscksp.h.html#KSP_NORM_NATURAL">src/ksp/ksp/guess/../../../../include/petscksp.h</A>
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