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<div id="version" align=right><b>petsc-3.10.3 2018-12-18</b></div>
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<A NAME="KSPPIPEGCRSetTruncationType"><H1>KSPPIPEGCRSetTruncationType</H1></A>
specify how many of its stored previous directions PIPEGCR uses during orthoganalization
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscksp.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../KSP/KSPPIPEGCRSetTruncationType.html#KSPPIPEGCRSetTruncationType">KSPPIPEGCRSetTruncationType</A>(<A HREF="../KSP/KSP.html#KSP">KSP</A> ksp,<A HREF="../KSP/KSPFCDTruncationType.html#KSPFCDTruncationType">KSPFCDTruncationType</A> truncstrat)
</PRE>
Logically Collective on <A HREF="../KSP/KSP.html#KSP">KSP</A>
<P>
<A HREF="../KSP/KSPFCDTruncationType.html#KSPFCDTruncationType">KSP_FCD_TRUNC_TYPE_STANDARD</A> uses all (up to mmax) stored directions
<A HREF="../KSP/KSPFCDTruncationType.html#KSPFCDTruncationType">KSP_FCD_TRUNC_TYPE_NOTAY</A> uses the last max(1,mod(i,mmax)) directions at iteration i=0,1,..
<P>
<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>- the Krylov space context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>truncstrat </B></TD><TD>- the choice of strategy
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Options Database</FONT></H3>
<DT><B>-ksp_pipegcr_truncation_type <standard,notay> </B> -which stored basis vectors to orthogonalize against
<br>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../KSP/KSPPIPEGCR.html#KSPPIPEGCR">KSPPIPEGCR</A>, <A HREF="../KSP/KSPPIPEGCRSetTruncationType.html#KSPPIPEGCRSetTruncationType">KSPPIPEGCRSetTruncationType</A>, KSPPIPEGCRTruncationType, <A HREF="../KSP/KSPFCDTruncationType.html#KSPFCDTruncationType">KSPFCDTruncationType</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/gcr/pipegcr/pipegcr.c.html#KSPPIPEGCRSetTruncationType">src/ksp/ksp/impls/gcr/pipegcr/pipegcr.c</A>
<BR><A HREF="./index.html">Index of all KSP routines</A>
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