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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</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-3.7.5 v3.7.5 docs/manualpages/KSP/KSP_NORM_NONE.html "><small>Report Typos and Errors</small></a></div>
<A NAME="KSP_NORM_NONE"><H1>KSP_NORM_NONE</H1></A>
Do not compute a norm during the Krylov process. This will possibly save some computation but means the convergence test cannot be based on a norm of a residual etc.
<P>
Note: Some Krylov methods need to compute a residual norm (such as GMRES) and then this option is ignored
<P>
<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_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/KSP_NORM_NATURAL.html#KSP_NORM_NATURAL">KSP_NORM_NATURAL</A>
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/ksp/../../../include/petscksp.h.html#KSP_NORM_NONE">src/ksp/ksp/../../../include/petscksp.h</A>
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