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<div id="version" align=right><b>slepc-3.23.1 2025-05-01</b></div>
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<H1>NEPProjectOperator</H1>
Computes the projection of the nonlinear operator.
<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/NEPProjectOperator.html#NEPProjectOperator">NEPProjectOperator</A>(<A HREF="../NEP/NEP.html#NEP">NEP</A> nep,<A HREF="https://petsc.org/release/manualpages/Sys/PetscInt.html#PetscInt">PetscInt</A> j0,<A HREF="https://petsc.org/release/manualpages/Sys/PetscInt.html#PetscInt">PetscInt</A> j1)
</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>j0 </B></TD><TD> - initial index
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>j1 </B></TD><TD> - final index
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
This is available for split operator only.
<P>
The nonlinear operator T(lambda) is projected onto span(V), where V is
an orthonormal basis built internally by the solver. The projected
operator is equal to sum_i V'*A_i*V*f_i(lambda), so this function
computes all matrices Ei = V'*A_i*V, and stores them in the extra
matrices inside <A HREF="../DS/DS.html#DS">DS</A>. Only rows/columns in the range [j0,j1-1] are computed,
the previous ones are assumed to be available already.
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../NEP/NEPSetSplitOperator.html#NEPSetSplitOperator">NEPSetSplitOperator</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#NEPProjectOperator">src/nep/interface/nepsolve.c</A>
<BR><BR><A HREF="./index.html">Index of all NEP routines</A>
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