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<div id="version" align=right><b>slepc-3.23.1 2025-05-01</b></div>
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<H1>NEPSetFunction</H1>
Sets the function to compute the nonlinear Function T(lambda) as well as the location to store the matrix.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcnep.h"
<A HREF="https://petsc.org/release/manualpages/Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../NEP/NEPSetFunction.html#NEPSetFunction">NEPSetFunction</A>(<A HREF="../NEP/NEP.html#NEP">NEP</A> nep,<A HREF="https://petsc.org/release/manualpages/Mat/Mat.html#Mat">Mat</A> A,<A HREF="https://petsc.org/release/manualpages/Mat/Mat.html#Mat">Mat</A> B,<A HREF="../NEP/NEPFunctionFn.html#NEPFunctionFn">NEPFunctionFn</A> *fun,void *ctx)
</PRE>
Collective
<P>
<H3><FONT COLOR="#883300">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>nep </B></TD><TD> - the <A HREF="../NEP/NEP.html#NEP">NEP</A> context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>A </B></TD><TD> - Function matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>B </B></TD><TD> - preconditioner matrix (usually same as A)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>fun </B></TD><TD> - Function evaluation routine (if NULL then <A HREF="../NEP/NEP.html#NEP">NEP</A> retains any
previously set value), see <A HREF="../NEP/NEPFunctionFn.html#NEPFunctionFn">NEPFunctionFn</A> for the calling sequence
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ctx </B></TD><TD> - [optional] user-defined context for private data for the Function
evaluation routine (may be NULL) (if NULL then <A HREF="../NEP/NEP.html#NEP">NEP</A> retains any
previously set value)
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../NEP/NEPGetFunction.html#NEPGetFunction">NEPGetFunction</A>(), <A HREF="../NEP/NEPSetJacobian.html#NEPSetJacobian">NEPSetJacobian</A>()
<BR><P><B></B><H3><FONT COLOR="#883300">Level</FONT></H3>beginner<BR>
<H3><FONT COLOR="#883300">Location</FONT></H3>
</B><A HREF="../../../src/nep/interface/nepbasic.c.html#NEPSetFunction">src/nep/interface/nepbasic.c</A>
<P><H3><FONT COLOR="#883300">Examples</FONT></H3>
<A HREF="../../../src/nep/tutorials/ex20.c.html">src/nep/tutorials/ex20.c</A><BR>
<A HREF="../../../src/nep/tutorials/ex20f.F90.html">src/nep/tutorials/ex20f.F90</A><BR>
<A HREF="../../../src/nep/tutorials/ex21.c.html">src/nep/tutorials/ex21.c</A><BR>
<A HREF="../../../src/nep/tutorials/ex27.c.html">src/nep/tutorials/ex27.c</A><BR>
<A HREF="../../../src/nep/tutorials/ex27f.F90.html">src/nep/tutorials/ex27f.F90</A><BR>
<A HREF="../../../src/nep/tutorials/ex54f.F90.html">src/nep/tutorials/ex54f.F90</A><BR>
<BR><BR><A HREF="./index.html">Index of all NEP routines</A>
<BR><A HREF="../../../docs/manual.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
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