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<TITLE>STShellSetBackTransform</TITLE>
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<H1>STShellSetBackTransform</H1>
Sets the routine to be called after the eigensolution process has finished in order to transform back the computed eigenvalues.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcst.h"
PetscErrorCode STShellSetBackTransform(ST st,PetscErrorCode (*backtr)(ST,PetscInt,PetscScalar*,PetscScalar*))
</PRE>
Logically Collective on <A HREF="../ST/ST.html#ST">ST</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>st </B></TD><TD> - the spectral transformation context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>backtr </B></TD><TD> - the application-provided backtransform routine
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Calling sequence of backtr</FONT></H3>
<PRE>
PetscErrorCode backtr(<A HREF="../ST/ST.html#ST">ST</A> st,PetscScalar *eigr,PetscScalar *eigi)
</PRE>
<P>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>st </B></TD><TD> - the spectral transformation context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>eigr </B></TD><TD> - pointer ot the real part of the eigenvalue to transform back
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>eigi </B></TD><TD> - pointer ot the imaginary part
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../ST/STShellSetApply.html#STShellSetApply">STShellSetApply</A>(), <A HREF="../ST/STShellSetApplyTranspose.html#STShellSetApplyTranspose">STShellSetApplyTranspose</A>()
<BR><P><B><FONT COLOR="#883300">Location: </FONT></B><A HREF="../../../src/st/impls/shell/shell.c.html#STShellSetBackTransform">src/st/impls/shell/shell.c</A>
<BR><A HREF="./index.html">Index of all ST routines</A>
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<P><H3><FONT COLOR="#883300">Examples</FONT></H3>
<A HREF="../../../src/st/examples/tutorials/ex10.c.html">src/st/examples/tutorials/ex10.c.html</A><BR>
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