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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
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<TITLE>MFNGetOptionsPrefix</TITLE>
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<div id="version" align=right><b>slepc-3.22.2 2024-12-02</b></div>
<div id="bugreport" align=right><a href="mailto:slepc-maint@upv.es?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: slepc-3.22.2 v3.22.2 docs/manualpages/MFN/MFNGetOptionsPrefix.html "><small>Report Typos and Errors</small></a></div>
<H1>MFNGetOptionsPrefix</H1>
Gets the prefix used for searching for all <A HREF="../MFN/MFN.html#MFN">MFN</A> options in the database.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcmfn.h"
<A HREF="https://petsc.org/release/manualpages/Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../MFN/MFNGetOptionsPrefix.html#MFNGetOptionsPrefix">MFNGetOptionsPrefix</A>(<A HREF="../MFN/MFN.html#MFN">MFN</A> mfn,const char *prefix[])
</PRE>
Not 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>mfn </B></TD><TD> - the matrix function context
</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>prefix </B></TD><TD> - pointer to the prefix string used is returned
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Note</FONT></H3>
On the Fortran side, the user should pass in a string 'prefix' of
sufficient length to hold the prefix.
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../MFN/MFNSetOptionsPrefix.html#MFNSetOptionsPrefix">MFNSetOptionsPrefix</A>(), <A HREF="../MFN/MFNAppendOptionsPrefix.html#MFNAppendOptionsPrefix">MFNAppendOptionsPrefix</A>()
<BR><P><B></B><H3><FONT COLOR="#883300">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#883300">Location</FONT></H3>
</B><A HREF="../../../src/mfn/interface/mfnopts.c.html#MFNGetOptionsPrefix">src/mfn/interface/mfnopts.c</A>
<BR><BR><A HREF="./index.html">Index of all MFN routines</A>
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