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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
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<HEAD> <link rel="canonical" href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/PC/PCApply.html" />
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<TITLE>PCApply</TITLE>
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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</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-3.14.5 v3.14.5 docs/manualpages/PC/PCApply.html "><small>Report Typos and Errors</small></a></div>
<A NAME="PCApply"><H1>PCApply</H1></A>
Applies the preconditioner to a vector.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscksp.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../PC/PCApply.html#PCApply">PCApply</A>(<A HREF="../PC/PC.html#PC">PC</A> pc,<A HREF="../Vec/Vec.html#Vec">Vec</A> x,<A HREF="../Vec/Vec.html#Vec">Vec</A> y)
</PRE>
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>x </B></TD><TD>- input vector
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>y </B></TD><TD>- output vector
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCApplyTranspose.html#PCApplyTranspose">PCApplyTranspose</A>(), <A HREF="../PC/PCApplyBAorAB.html#PCApplyBAorAB">PCApplyBAorAB</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>developer<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/ksp/pc/interface/precon.c.html#PCApply">src/ksp/pc/interface/precon.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/ksp/ksp/tutorials/ex79.c.html">src/ksp/ksp/tutorials/ex79.c.html</A><BR>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/ksp/pc/impls/asm/asm.c.html#PCApply_ASM">PCApply_ASM in src/ksp/pc/impls/asm/asm.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/bddc/bddc.c.html#PCApply_BDDC">PCApply_BDDC in src/ksp/pc/impls/bddc/bddc.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/bddc/bddc.c.html#PCApply_BDDCIPC">PCApply_BDDCIPC in src/ksp/pc/impls/bddc/bddc.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/bjacobi/bjacobi.c.html#PCApply_BJacobi_Singleblock">PCApply_BJacobi_Singleblock in src/ksp/pc/impls/bjacobi/bjacobi.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/bjacobi/bjacobi.c.html#PCApply_BJacobi_Multiblock">PCApply_BJacobi_Multiblock in src/ksp/pc/impls/bjacobi/bjacobi.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/bjacobi/bjacobi.c.html#PCApply_BJacobi_Multiproc">PCApply_BJacobi_Multiproc in src/ksp/pc/impls/bjacobi/bjacobi.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/chowiluviennacl/chowiluviennacl.cxx.html#PCApply_CHOWILUVIENNACL">PCApply_CHOWILUVIENNACL in src/ksp/pc/impls/chowiluviennacl/chowiluviennacl.cxx</A><BR>
<A HREF="../../../src/ksp/pc/impls/composite/composite.c.html#PCApply_Composite_Multiplicative">PCApply_Composite_Multiplicative in src/ksp/pc/impls/composite/composite.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/composite/composite.c.html#PCApply_Composite_Special">PCApply_Composite_Special in src/ksp/pc/impls/composite/composite.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/composite/composite.c.html#PCApply_Composite_Additive">PCApply_Composite_Additive in src/ksp/pc/impls/composite/composite.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/cp/cp.c.html#PCApply_CP">PCApply_CP in src/ksp/pc/impls/cp/cp.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/deflation/deflation.c.html#PCApply_Deflation">PCApply_Deflation in src/ksp/pc/impls/deflation/deflation.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/eisens/eisen.c.html#PCApply_Eisenstat">PCApply_Eisenstat in src/ksp/pc/impls/eisens/eisen.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/factor/cholesky/cholesky.c.html#PCApply_Cholesky">PCApply_Cholesky in src/ksp/pc/impls/factor/cholesky/cholesky.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/factor/icc/icc.c.html#PCApply_ICC">PCApply_ICC in src/ksp/pc/impls/factor/icc/icc.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/factor/ilu/ilu.c.html#PCApply_ILU">PCApply_ILU in src/ksp/pc/impls/factor/ilu/ilu.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/factor/lu/lu.c.html#PCApply_LU">PCApply_LU in src/ksp/pc/impls/factor/lu/lu.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/fieldsplit/fieldsplit.c.html#PCApply_FieldSplit_Schur">PCApply_FieldSplit_Schur in src/ksp/pc/impls/fieldsplit/fieldsplit.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/fieldsplit/fieldsplit.c.html#PCApply_FieldSplit">PCApply_FieldSplit in src/ksp/pc/impls/fieldsplit/fieldsplit.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/fieldsplit/fieldsplit.c.html#PCApply_FieldSplit_GKB">PCApply_FieldSplit_GKB in src/ksp/pc/impls/fieldsplit/fieldsplit.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/galerkin/galerkin.c.html#PCApply_Galerkin">PCApply_Galerkin in src/ksp/pc/impls/galerkin/galerkin.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/gasm/gasm.c.html#PCApply_GASM">PCApply_GASM in src/ksp/pc/impls/gasm/gasm.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/hara/pchara.cu.html#PCApply_HARA">PCApply_HARA in src/ksp/pc/impls/hara/pchara.cu</A><BR>
<A HREF="../../../src/ksp/pc/impls/hpddm/hpddm.cxx.html#PCApply_HPDDM">PCApply_HPDDM in src/ksp/pc/impls/hpddm/hpddm.cxx</A><BR>
<A HREF="../../../src/ksp/pc/impls/hypre/hypre.c.html#PCApply_HYPRE">PCApply_HYPRE in src/ksp/pc/impls/hypre/hypre.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/hypre/hypre.c.html#PCApply_PFMG">PCApply_PFMG in src/ksp/pc/impls/hypre/hypre.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/hypre/hypre.c.html#PCApply_SysPFMG">PCApply_SysPFMG in src/ksp/pc/impls/hypre/hypre.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/is/nn/nn.c.html#PCApply_NN">PCApply_NN in src/ksp/pc/impls/is/nn/nn.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/jacobi/jacobi.c.html#PCApply_Jacobi">PCApply_Jacobi in src/ksp/pc/impls/jacobi/jacobi.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/kaczmarz/kaczmarz.c.html#PCApply_Kaczmarz">PCApply_Kaczmarz in src/ksp/pc/impls/kaczmarz/kaczmarz.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/ksp/pcksp.c.html#PCApply_KSP">PCApply_KSP in src/ksp/pc/impls/ksp/pcksp.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/lmvm/lmvmpc.c.html#PCApply_LMVM">PCApply_LMVM in src/ksp/pc/impls/lmvm/lmvmpc.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/lsc/lsc.c.html#PCApply_LSC">PCApply_LSC in src/ksp/pc/impls/lsc/lsc.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/mat/pcmat.c.html#PCApply_Mat">PCApply_Mat in src/ksp/pc/impls/mat/pcmat.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/mg/mg.c.html#PCApply_MG">PCApply_MG in src/ksp/pc/impls/mg/mg.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/none/none.c.html#PCApply_None">PCApply_None in src/ksp/pc/impls/none/none.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/parms/parms.c.html#PCApply_PARMS">PCApply_PARMS in src/ksp/pc/impls/parms/parms.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/patch/pcpatch.c.html#PCApply_PATCH_Linear">PCApply_PATCH_Linear in src/ksp/pc/impls/patch/pcpatch.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/patch/pcpatch.c.html#PCApply_PATCH">PCApply_PATCH in src/ksp/pc/impls/patch/pcpatch.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/pbjacobi/pbjacobi.c.html#PCApply_PBJacobi_1">PCApply_PBJacobi_1 in src/ksp/pc/impls/pbjacobi/pbjacobi.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/pbjacobi/pbjacobi.c.html#PCApply_PBJacobi_2">PCApply_PBJacobi_2 in src/ksp/pc/impls/pbjacobi/pbjacobi.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/pbjacobi/pbjacobi.c.html#PCApply_PBJacobi_3">PCApply_PBJacobi_3 in src/ksp/pc/impls/pbjacobi/pbjacobi.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/pbjacobi/pbjacobi.c.html#PCApply_PBJacobi_4">PCApply_PBJacobi_4 in src/ksp/pc/impls/pbjacobi/pbjacobi.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/pbjacobi/pbjacobi.c.html#PCApply_PBJacobi_5">PCApply_PBJacobi_5 in src/ksp/pc/impls/pbjacobi/pbjacobi.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/pbjacobi/pbjacobi.c.html#PCApply_PBJacobi_6">PCApply_PBJacobi_6 in src/ksp/pc/impls/pbjacobi/pbjacobi.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/pbjacobi/pbjacobi.c.html#PCApply_PBJacobi_7">PCApply_PBJacobi_7 in src/ksp/pc/impls/pbjacobi/pbjacobi.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/pbjacobi/pbjacobi.c.html#PCApply_PBJacobi_N">PCApply_PBJacobi_N in src/ksp/pc/impls/pbjacobi/pbjacobi.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/redistribute/redistribute.c.html#PCApply_Redistribute">PCApply_Redistribute in src/ksp/pc/impls/redistribute/redistribute.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/redundant/redundant.c.html#PCApply_Redundant">PCApply_Redundant in src/ksp/pc/impls/redundant/redundant.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/rowscalingviennacl/rowscalingviennacl.cxx.html#PCApply_ROWSCALINGVIENNACL">PCApply_ROWSCALINGVIENNACL in src/ksp/pc/impls/rowscalingviennacl/rowscalingviennacl.cxx</A><BR>
<A HREF="../../../src/ksp/pc/impls/saviennacl/saviennacl.cxx.html#PCApply_SAVIENNACL">PCApply_SAVIENNACL in src/ksp/pc/impls/saviennacl/saviennacl.cxx</A><BR>
<A HREF="../../../src/ksp/pc/impls/shell/shellpc.c.html#PCApply_Shell">PCApply_Shell in src/ksp/pc/impls/shell/shellpc.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/sor/sor.c.html#PCApply_SOR">PCApply_SOR in src/ksp/pc/impls/sor/sor.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/spai/ispai.c.html#PCApply_SPAI">PCApply_SPAI in src/ksp/pc/impls/spai/ispai.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/svd/svd.c.html#PCApply_SVD">PCApply_SVD in src/ksp/pc/impls/svd/svd.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/telescope/telescope.c.html#PCApply_Telescope">PCApply_Telescope in src/ksp/pc/impls/telescope/telescope.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/telescope/telescope_coarsedm.c.html#PCApply_Telescope_CoarseDM">PCApply_Telescope_CoarseDM in src/ksp/pc/impls/telescope/telescope_coarsedm.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/telescope/telescope_dmda.c.html#PCApply_Telescope_dmda">PCApply_Telescope_dmda in src/ksp/pc/impls/telescope/telescope_dmda.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/tfs.c.html#PCApply_TFS_XXT">PCApply_TFS_XXT in src/ksp/pc/impls/tfs/tfs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/tfs.c.html#PCApply_TFS_XYT">PCApply_TFS_XYT in src/ksp/pc/impls/tfs/tfs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/vpbjacobi/vpbjacobi.c.html#PCApply_VPBJacobi">PCApply_VPBJacobi in src/ksp/pc/impls/vpbjacobi/vpbjacobi.c</A><BR>
<A HREF="../../../src/snes/impls/patch/snespatch.c.html#PCApply_PATCH_Nonlinear">PCApply_PATCH_Nonlinear in src/snes/impls/patch/snespatch.c</A><BR>
<BR><A HREF="./index.html">Index of all PC routines</A>
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