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<div id="version" align=right><b>slepc-3.22.2 2024-12-02</b></div>
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<H1>EPSCISSSetQuadRule</H1>
Sets the quadrature rule used in the CISS solver.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepceps.h"
<A HREF="https://petsc.org/release/manualpages/Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../EPS/EPSCISSSetQuadRule.html#EPSCISSSetQuadRule">EPSCISSSetQuadRule</A>(<A HREF="../EPS/EPS.html#EPS">EPS</A> eps,<A HREF="../EPS/EPSCISSQuadRule.html#EPSCISSQuadRule">EPSCISSQuadRule</A> quad)
</PRE>
Logically 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>eps </B></TD><TD> - the eigenproblem solver context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>quad </B></TD><TD> - the quadrature rule
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Options Database Key</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_ciss_quadrule </B></TD><TD> - Sets the quadrature rule (either 'trapezoidal' or
'chebyshev')
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
By default, the trapezoidal rule is used (<A HREF="../EPS/EPSCISSQuadRule.html#EPSCISSQuadRule">EPS_CISS_QUADRULE_TRAPEZOIDAL</A>).
<P>
If the 'chebyshev' option is specified (<A HREF="../EPS/EPSCISSQuadRule.html#EPSCISSQuadRule">EPS_CISS_QUADRULE_CHEBYSHEV</A>), then
Chebyshev points are used as quadrature points.
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../EPS/EPSCISSGetQuadRule.html#EPSCISSGetQuadRule">EPSCISSGetQuadRule</A>(), <A HREF="../EPS/EPSCISSQuadRule.html#EPSCISSQuadRule">EPSCISSQuadRule</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/eps/impls/ciss/ciss.c.html#EPSCISSSetQuadRule">src/eps/impls/ciss/ciss.c</A>
<BR><BR><A HREF="./index.html">Index of all EPS routines</A>
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