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<TITLE>PCShellSetApply</TITLE>
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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/PC/PCShellSetApply.html "><small>Report Typos and Errors</small></a></div>
<A NAME="PCShellSetApply"><H1>PCShellSetApply</H1></A>
Sets routine to use as preconditioner.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
PetscErrorCode PCShellSetApply(PC pc,PetscErrorCode (*apply)(PC,Vec,Vec))
</PRE>
Logically Collective on <A HREF="../PC/PC.html#PC">PC</A>
<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>pc </B></TD><TD>- the preconditioner context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>apply </B></TD><TD>- the application-provided preconditioning routine
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Calling sequence of apply</FONT></H3>
<PRE>
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> apply (<A HREF="../PC/PC.html#PC">PC</A> pc,<A HREF="../Vec/Vec.html#Vec">Vec</A> xin,<A HREF="../Vec/Vec.html#Vec">Vec</A> xout)
</PRE>
<P>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>pc </B></TD><TD>- the preconditioner, get the application context with <A HREF="../PC/PCShellGetContext.html#PCShellGetContext">PCShellGetContext</A>()
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>xin </B></TD><TD>- input vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>xout </B></TD><TD>- output vector
</TD></TR></TABLE>
<P>
Notes: the function MUST return an error code of 0 on success and nonzero on failure.
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../PC/PC.html#PC">PC</A>, shell, set, apply, user-provided
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCShellSetApplyRichardson.html#PCShellSetApplyRichardson">PCShellSetApplyRichardson</A>(), <A HREF="../PC/PCShellSetSetUp.html#PCShellSetSetUp">PCShellSetSetUp</A>(), <A HREF="../PC/PCShellSetApplyTranspose.html#PCShellSetApplyTranspose">PCShellSetApplyTranspose</A>(), <A HREF="../PC/PCShellSetContext.html#PCShellSetContext">PCShellSetContext</A>(), <A HREF="../PC/PCShellSetApplyBA.html#PCShellSetApplyBA">PCShellSetApplyBA</A>(), <A HREF="../PC/PCShellSetApplySymmetricRight.html#PCShellSetApplySymmetricRight">PCShellSetApplySymmetricRight</A>(),<A HREF="../PC/PCShellSetApplySymmetricLeft.html#PCShellSetApplySymmetricLeft">PCShellSetApplySymmetricLeft</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>developer
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/pc/impls/shell/shellpc.c.html#PCShellSetApply">src/ksp/pc/impls/shell/shellpc.c</A>
<BR><A HREF="./index.html">Index of all PC routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex15.c.html">src/ksp/ksp/examples/tutorials/ex15.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex15f.F.html">src/ksp/ksp/examples/tutorials/ex15f.F.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex21f.F.html">src/ksp/ksp/examples/tutorials/ex21f.F.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex3.c.html">src/snes/examples/tutorials/ex3.c.html</A><BR>
<A HREF="../../../src/tao/pde_constrained/examples/tutorials/parabolic.c.html">src/tao/pde_constrained/examples/tutorials/parabolic.c.html</A><BR>
<A HREF="../../../src/tao/pde_constrained/examples/tutorials/hyperbolic.c.html">src/tao/pde_constrained/examples/tutorials/hyperbolic.c.html</A><BR>
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