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<div id="version" align=right><b>slepc-3.22.2 2024-12-02</b></div>
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<H1>EPSSetOperators</H1>
Sets the matrices associated with the eigenvalue problem.
<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/EPSSetOperators.html#EPSSetOperators">EPSSetOperators</A>(<A HREF="../EPS/EPS.html#EPS">EPS</A> eps,<A HREF="https://petsc.org/release/manualpages/Mat/Mat.html#Mat">Mat</A> A,<A HREF="https://petsc.org/release/manualpages/Mat/Mat.html#Mat">Mat</A> B)
</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>eps </B></TD><TD> - the eigenproblem solver context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>A </B></TD><TD> - the matrix associated with the eigensystem
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>B </B></TD><TD> - the second matrix in the case of generalized eigenproblems
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
To specify a standard eigenproblem, use NULL for parameter B.
<P>
It must be called before <A HREF="../EPS/EPSSetUp.html#EPSSetUp">EPSSetUp</A>(). If it is called again after <A HREF="../EPS/EPSSetUp.html#EPSSetUp">EPSSetUp</A>() and
the matrix sizes have changed then the <A HREF="../EPS/EPS.html#EPS">EPS</A> object is reset.
<P>
For structured eigenproblem types such as <A HREF="../EPS/EPSProblemType.html#EPSProblemType">EPS_BSE</A> (see <A HREF="../EPS/EPSSetProblemType.html#EPSSetProblemType">EPSSetProblemType</A>()), the
provided matrices must have been created with the corresponding helper function,
i.e., <A HREF="../sys/MatCreateBSE.html#MatCreateBSE">MatCreateBSE</A>().
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../EPS/EPSSolve.html#EPSSolve">EPSSolve</A>(), <A HREF="../EPS/EPSSetUp.html#EPSSetUp">EPSSetUp</A>(), <A HREF="../EPS/EPSReset.html#EPSReset">EPSReset</A>(), <A HREF="../EPS/EPSGetST.html#EPSGetST">EPSGetST</A>(), <A HREF="../ST/STGetMatrix.html#STGetMatrix">STGetMatrix</A>(), <A HREF="../EPS/EPSSetProblemType.html#EPSSetProblemType">EPSSetProblemType</A>()
<BR><P><B></B><H3><FONT COLOR="#883300">Level</FONT></H3>beginner<BR>
<H3><FONT COLOR="#883300">Location</FONT></H3>
</B><A HREF="../../../src/eps/interface/epssetup.c.html#EPSSetOperators">src/eps/interface/epssetup.c</A>
<P><H3><FONT COLOR="#883300">Examples</FONT></H3>
<A HREF="../../../src/eps/tutorials/ex1.c.html">src/eps/tutorials/ex1.c</A><BR>
<A HREF="../../../src/eps/tutorials/ex1f.F90.html">src/eps/tutorials/ex1f.F90</A><BR>
<A HREF="../../../src/eps/tutorials/ex2.c.html">src/eps/tutorials/ex2.c</A><BR>
<A HREF="../../../src/eps/tutorials/ex3.c.html">src/eps/tutorials/ex3.c</A><BR>
<A HREF="../../../src/eps/tutorials/ex4.c.html">src/eps/tutorials/ex4.c</A><BR>
<A HREF="../../../src/eps/tutorials/ex5.c.html">src/eps/tutorials/ex5.c</A><BR>
<A HREF="../../../src/eps/tutorials/ex6f.F90.html">src/eps/tutorials/ex6f.F90</A><BR>
<A HREF="../../../src/eps/tutorials/ex7.c.html">src/eps/tutorials/ex7.c</A><BR>
<A HREF="../../../src/eps/tutorials/ex9.c.html">src/eps/tutorials/ex9.c</A><BR>
<A HREF="../../../src/eps/tutorials/ex10.c.html">src/eps/tutorials/ex10.c</A><BR>
<A HREF="../../../src/eps/tutorials/ex10f.F90.html">src/eps/tutorials/ex10f.F90</A><BR>
<BR><BR><A HREF="./index.html">Index of all EPS routines</A>
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