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<H1>NEPApplyFunction</H1>
Applies the nonlinear function T(lambda) to a given vector.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcnep.h"
PetscErrorCode NEPApplyFunction(NEP nep,PetscScalar lambda,Vec x,Vec v,Vec y,Mat *A,Mat *B,MatStructure *flg)
</PRE>
Collective on <A HREF="../NEP/NEP.html#NEP">NEP</A>
<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 nonlinear eigensolver context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>lambda </B></TD><TD> - scalar argument
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>x </B></TD><TD> - vector to be multiplied against
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>v </B></TD><TD> - workspace vector
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Output Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>y </B></TD><TD> - result vector
</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> - optional preconditioning matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>flg </B></TD><TD> - flag indicating matrix structure (see MatStructure enum)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Note</FONT></H3>
If the nonlinear operator is represented in split form, the result
y = T(lambda)*x is computed without building T(lambda) explicitly. In
that case, parameters A, B and flg are not used. Otherwise, the matrix
T(lambda) is built and the effect is the same as a call to
<A HREF="../NEP/NEPComputeFunction.html#NEPComputeFunction">NEPComputeFunction</A>() followed by a MatMult().
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../NEP/NEPSetSplitOperator.html#NEPSetSplitOperator">NEPSetSplitOperator</A>(), <A HREF="../NEP/NEPComputeFunction.html#NEPComputeFunction">NEPComputeFunction</A>()
<BR><P><B><FONT COLOR="#883300">Location: </FONT></B><A HREF="../../../src/nep/interface/nepsolve.c.html#NEPApplyFunction">src/nep/interface/nepsolve.c</A>
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