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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/KSPSYMMLQ.html "><small>Report Typos and Errors</small></a></div>
<A NAME="KSPSYMMLQ"><H1>KSPSYMMLQ</H1></A>
This code implements the SYMMLQ method.
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<DT><B>see <A HREF="../KSP/KSPSolve.html#KSPSolve">KSPSolve</A>()</B> -
<br>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
The operator and the preconditioner must be symmetric for this method. The
preconditioner must be POSITIVE-DEFINITE.
<P>
Supports only left preconditioning.
<P>
Reference: Paige & Saunders, 1975.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../KSP/KSPCreate.html#KSPCreate">KSPCreate</A>(), <A HREF="../KSP/KSPSetType.html#KSPSetType">KSPSetType</A>(), <A HREF="../KSP/KSPType.html#KSPType">KSPType</A> (for list of available types), <A HREF="../KSP/KSP.html#KSP">KSP</A>
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>beginner<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/ksp/ksp/impls/symmlq/symmlq.c.html#KSPSYMMLQ">src/ksp/ksp/impls/symmlq/symmlq.c</A>
<BR><A HREF="./index.html">Index of all KSP routines</A>
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