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<TITLE>SNESSolve</TITLE>
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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/SNES/SNESSolve.html "><small>Report Typos and Errors</small></a></div>
<A NAME="SNESSolve"><H1>SNESSolve</H1></A>
Solves a nonlinear system F(x) = b. Call <A HREF="../SNES/SNESSolve.html#SNESSolve">SNESSolve</A>() after calling <A HREF="../SNES/SNESCreate.html#SNESCreate">SNESCreate</A>() and optional routines of the form SNESSetXXX().
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsnes.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../SNES/SNESSolve.html#SNESSolve">SNESSolve</A>(<A HREF="../SNES/SNES.html#SNES">SNES</A> snes,<A HREF="../Vec/Vec.html#Vec">Vec</A> b,<A HREF="../Vec/Vec.html#Vec">Vec</A> x)
</PRE>
Collective on <A HREF="../SNES/SNES.html#SNES">SNES</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>snes </B></TD><TD>- the <A HREF="../SNES/SNES.html#SNES">SNES</A> context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>b </B></TD><TD>- the constant part of the equation F(x) = b, or NULL to use zero.
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>x </B></TD><TD>- the solution vector.
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
The user should initialize the vector,x, with the initial guess
for the nonlinear solve prior to calling <A HREF="../SNES/SNESSolve.html#SNESSolve">SNESSolve</A>. In particular,
to employ an initial guess of zero, the user should explicitly set
this vector to zero by calling <A HREF="../Vec/VecSet.html#VecSet">VecSet</A>().
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../SNES/SNES.html#SNES">SNES</A>, nonlinear, solve
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../SNES/SNESCreate.html#SNESCreate">SNESCreate</A>(), <A HREF="../SNES/SNESDestroy.html#SNESDestroy">SNESDestroy</A>(), <A HREF="../SNES/SNESSetFunction.html#SNESSetFunction">SNESSetFunction</A>(), <A HREF="../SNES/SNESSetJacobian.html#SNESSetJacobian">SNESSetJacobian</A>(), <A HREF="../SNES/SNESSetGridSequence.html#SNESSetGridSequence">SNESSetGridSequence</A>(), <A HREF="../SNES/SNESGetSolution.html#SNESGetSolution">SNESGetSolution</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/snes/interface/snes.c.html#SNESSolve">src/snes/interface/snes.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/snes/examples/tutorials/ex1.c.html">src/snes/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex2.c.html">src/snes/examples/tutorials/ex2.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex3.c.html">src/snes/examples/tutorials/ex3.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex5.c.html">src/snes/examples/tutorials/ex5.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex5s.c.html">src/snes/examples/tutorials/ex5s.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex9.c.html">src/snes/examples/tutorials/ex9.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex12.c.html">src/snes/examples/tutorials/ex12.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex14.c.html">src/snes/examples/tutorials/ex14.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex15.c.html">src/snes/examples/tutorials/ex15.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex18.c.html">src/snes/examples/tutorials/ex18.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex19.c.html">src/snes/examples/tutorials/ex19.c.html</A><BR>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/snes/impls/composite/snescomposite.c.html#SNESSolve_Composite">SNESSolve_Composite in src/snes/impls/composite/snescomposite.c</A><BR>
<A HREF="../../../src/snes/impls/fas/fas.c.html#SNESSolve_FAS">SNESSolve_FAS in src/snes/impls/fas/fas.c</A><BR>
<A HREF="../../../src/snes/impls/gs/snesgs.c.html#SNESSolve_NGS">SNESSolve_NGS in src/snes/impls/gs/snesgs.c</A><BR>
<A HREF="../../../src/snes/impls/ksponly/ksponly.c.html#SNESSolve_KSPONLY">SNESSolve_KSPONLY in src/snes/impls/ksponly/ksponly.c</A><BR>
<A HREF="../../../src/snes/impls/ls/ls.c.html#SNESSolve_NEWTONLS">SNESSolve_NEWTONLS in src/snes/impls/ls/ls.c</A><BR>
<A HREF="../../../src/snes/impls/ms/ms.c.html#SNESSolve_MS">SNESSolve_MS in src/snes/impls/ms/ms.c</A><BR>
<A HREF="../../../src/snes/impls/multiblock/multiblock.c.html#SNESSolve_Multiblock">SNESSolve_Multiblock in src/snes/impls/multiblock/multiblock.c</A><BR>
<A HREF="../../../src/snes/impls/nasm/nasm.c.html#SNESSolve_NASM">SNESSolve_NASM in src/snes/impls/nasm/nasm.c</A><BR>
<A HREF="../../../src/snes/impls/ncg/snesncg.c.html#SNESSolve_NCG">SNESSolve_NCG in src/snes/impls/ncg/snesncg.c</A><BR>
<A HREF="../../../src/snes/impls/ngmres/anderson.c.html#SNESSolve_Anderson">SNESSolve_Anderson in src/snes/impls/ngmres/anderson.c</A><BR>
<A HREF="../../../src/snes/impls/ngmres/snesngmres.c.html#SNESSolve_NGMRES">SNESSolve_NGMRES in src/snes/impls/ngmres/snesngmres.c</A><BR>
<A HREF="../../../src/snes/impls/qn/qn.c.html#SNESSolve_QN">SNESSolve_QN in src/snes/impls/qn/qn.c</A><BR>
<A HREF="../../../src/snes/impls/richardson/snesrichardson.c.html#SNESSolve_NRichardson">SNESSolve_NRichardson in src/snes/impls/richardson/snesrichardson.c</A><BR>
<A HREF="../../../src/snes/impls/shell/snesshell.c.html#SNESSolve_Shell">SNESSolve_Shell in src/snes/impls/shell/snesshell.c</A><BR>
<A HREF="../../../src/snes/impls/tr/tr.c.html#SNESSolve_NEWTONTR">SNESSolve_NEWTONTR in src/snes/impls/tr/tr.c</A><BR>
<A HREF="../../../src/snes/impls/vi/rs/virs.c.html#SNESSolve_VINEWTONRSLS">SNESSolve_VINEWTONRSLS in src/snes/impls/vi/rs/virs.c</A><BR>
<A HREF="../../../src/snes/impls/vi/ss/viss.c.html#SNESSolve_VINEWTONSSLS">SNESSolve_VINEWTONSSLS in src/snes/impls/vi/ss/viss.c</A><BR>
<BR><A HREF="./index.html">Index of all SNES routines</A>
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