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<H1>NEPGetEigenpair</H1>
Gets the i-th solution of the eigenproblem as computed by <A HREF="../NEP/NEPSolve.html#NEPSolve">NEPSolve</A>(). The solution consists in both the eigenvalue and the eigenvector.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcnep.h"
PetscErrorCode NEPGetEigenpair(NEP nep,PetscInt i,PetscScalar *eig,Vec V)
</PRE>
Logically 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> - nonlinear eigensolver context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>i </B></TD><TD> - index of the solution
</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>eig </B></TD><TD> - eigenvalue
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>V </B></TD><TD> - eigenvector
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
If PETSc is configured with real scalars, then complex eigenpairs cannot
be obtained. Users should use a complex-scalar configuration. This
behaviour is different to other SLEPc solvers such as <A HREF="../EPS/EPS.html#EPS">EPS</A>.
<P>
The index i should be a value between 0 and nconv-1 (see <A HREF="../NEP/NEPGetConverged.html#NEPGetConverged">NEPGetConverged</A>()).
Eigenpairs are indexed according to the ordering criterion established
with <A HREF="../NEP/NEPSetWhichEigenpairs.html#NEPSetWhichEigenpairs">NEPSetWhichEigenpairs</A>().
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../NEP/NEPSolve.html#NEPSolve">NEPSolve</A>(), <A HREF="../NEP/NEPGetConverged.html#NEPGetConverged">NEPGetConverged</A>(), <A HREF="../NEP/NEPSetWhichEigenpairs.html#NEPSetWhichEigenpairs">NEPSetWhichEigenpairs</A>()
<BR><P><B><FONT COLOR="#883300">Location: </FONT></B><A HREF="../../../src/nep/interface/nepsolve.c.html#NEPGetEigenpair">src/nep/interface/nepsolve.c</A>
<BR><A HREF="./index.html">Index of all NEP routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#883300">Examples</FONT></H3>
<A HREF="../../../src/nep/examples/tutorials/ex20.c.html">src/nep/examples/tutorials/ex20.c.html</A><BR>
<A HREF="../../../src/nep/examples/tutorials/ex21.c.html">src/nep/examples/tutorials/ex21.c.html</A><BR>
<A HREF="../../../src/nep/examples/tutorials/ex22.c.html">src/nep/examples/tutorials/ex22.c.html</A><BR>
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