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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
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<A NAME="KSPHPDDMSetType"><H1>KSPHPDDMSetType</H1></A>
Sets the type of Krylov method used in <A HREF="../KSP/KSPHPDDM.html#KSPHPDDM">KSPHPDDM</A>.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscksp.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../KSP/KSPHPDDMSetType.html#KSPHPDDMSetType">KSPHPDDMSetType</A>(<A HREF="../KSP/KSP.html#KSP">KSP</A> ksp, <A HREF="../KSP/KSPHPDDMType.html#KSPHPDDMType">KSPHPDDMType</A> type)
</PRE>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ksp </B></TD><TD>- iterative context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>type </B></TD><TD>- any of gmres, bgmres, cg, bcg, gcrodr, bgcrodr, bfbcg, or preonly
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Unlike <A HREF="../KSP/KSPReset.html#KSPReset">KSPReset</A>(), this function does not destroy any deflation space attached to the <A HREF="../KSP/KSP.html#KSP">KSP</A>.
As an example, in the following sequence: <A HREF="../KSP/KSPHPDDMSetType.html#KSPHPDDMSetType">KSPHPDDMSetType</A>(ksp, KSPGCRODR); <A HREF="../KSP/KSPSolve.html#KSPSolve">KSPSolve</A>(ksp, b, x); <A HREF="../KSP/KSPHPDDMSetType.html#KSPHPDDMSetType">KSPHPDDMSetType</A>(ksp, <A HREF="../KSP/KSPGMRES.html#KSPGMRES">KSPGMRES</A>); <A HREF="../KSP/KSPHPDDMSetType.html#KSPHPDDMSetType">KSPHPDDMSetType</A>(ksp, KSPGCRODR); <A HREF="../KSP/KSPSolve.html#KSPSolve">KSPSolve</A>(ksp, b, x); the recycled space is reused in the second <A HREF="../KSP/KSPSolve.html#KSPSolve">KSPSolve</A>().
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../KSP/KSPCreate.html#KSPCreate">KSPCreate</A>(), <A HREF="../KSP/KSPType.html#KSPType">KSPType</A> (for list of available types), <A HREF="../KSP/KSPHPDDMType.html#KSPHPDDMType">KSPHPDDMType</A>, <A HREF="../KSP/KSPHPDDMGetType.html#KSPHPDDMGetType">KSPHPDDMGetType</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/ksp/ksp/impls/hpddm/hpddm.cxx.html#KSPHPDDMSetType">src/ksp/ksp/impls/hpddm/hpddm.cxx</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/ksp/ksp/impls/hpddm/hpddm.cxx.html#KSPHPDDMSetType_HPDDM">KSPHPDDMSetType_HPDDM in src/ksp/ksp/impls/hpddm/hpddm.cxx</A><BR>
<BR><A HREF="./index.html">Index of all KSP routines</A>
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