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<div id="version" align=right><b>slepc-3.22.2 2024-12-02</b></div>
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<H1>EPSSolve</H1>
Solves the eigensystem.
<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/EPSSolve.html#EPSSolve">EPSSolve</A>(<A HREF="../EPS/EPS.html#EPS">EPS</A> eps)
</PRE>
Collective
<P>
<H3><FONT COLOR="#883300">Input Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>eps </B></TD><TD> - eigensolver context obtained from <A HREF="../EPS/EPSCreate.html#EPSCreate">EPSCreate</A>()
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Options Database Keys</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_view </B></TD><TD> - print information about the solver used
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_view_mat0 </B></TD><TD> - view the first matrix (A)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_view_mat1 </B></TD><TD> - view the second matrix (B)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_view_vectors </B></TD><TD> - view the computed eigenvectors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_view_values </B></TD><TD> - view the computed eigenvalues
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_converged_reason </B></TD><TD> - print reason for convergence, and number of iterations
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_error_absolute </B></TD><TD> - print absolute errors of each eigenpair
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_error_relative </B></TD><TD> - print relative errors of each eigenpair
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_error_backward </B></TD><TD> - print backward errors of each eigenpair
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
All the command-line options listed above admit an optional argument specifying
the viewer type and options. For instance, use '-eps_view_mat0 binary:amatrix.bin'
to save the A matrix to a binary file, '-eps_view_values draw' to draw the computed
eigenvalues graphically, or '-eps_error_relative :myerr.m:ascii_matlab' to save
the errors in a file that can be executed in Matlab.
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../EPS/EPSCreate.html#EPSCreate">EPSCreate</A>(), <A HREF="../EPS/EPSSetUp.html#EPSSetUp">EPSSetUp</A>(), <A HREF="../EPS/EPSDestroy.html#EPSDestroy">EPSDestroy</A>(), <A HREF="../EPS/EPSSetTolerances.html#EPSSetTolerances">EPSSetTolerances</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/epssolve.c.html#EPSSolve">src/eps/interface/epssolve.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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