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<div id="version" align=right><b>slepc-3.22.2 2024-12-02</b></div>
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<H1>NEPApplyAdjoint</H1>
Applies the adjoint nonlinear function T(lambda)^* to a given vector.
<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/NEPApplyAdjoint.html#NEPApplyAdjoint">NEPApplyAdjoint</A>(<A HREF="../NEP/NEP.html#NEP">NEP</A> nep,<A HREF="https://petsc.org/release/manualpages/Sys/PetscScalar.html#PetscScalar">PetscScalar</A> lambda,<A HREF="https://petsc.org/release/manualpages/Vec/Vec.html#Vec">Vec</A> x,<A HREF="https://petsc.org/release/manualpages/Vec/Vec.html#Vec">Vec</A> v,<A HREF="https://petsc.org/release/manualpages/Vec/Vec.html#Vec">Vec</A> y,<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)
</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 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 (used only in the case of split form)
</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> - (optional) Function matrix, for callback interface only
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>B </B></TD><TD> - (unused) preconditioning matrix
</TD></TR></TABLE>
<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>(), <A HREF="../NEP/NEPApplyFunction.html#NEPApplyFunction">NEPApplyFunction</A>()
<BR><P><B></B><H3><FONT COLOR="#883300">Level</FONT></H3>developer<BR>
<H3><FONT COLOR="#883300">Location</FONT></H3>
</B><A HREF="../../../src/nep/interface/nepsolve.c.html#NEPApplyAdjoint">src/nep/interface/nepsolve.c</A>
<P><H3><FONT COLOR="#883300">Examples</FONT></H3>
<A HREF="../../../src/nep/tutorials/ex42.c.html">src/nep/tutorials/ex42.c</A><BR>
<BR><BR><A HREF="./index.html">Index of all NEP routines</A>
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