<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:10pt"><div><span>Dear Roman:</span></div><div style="color: rgb(0, 0, 0); font-size: 13.571429252624512px; font-family: arial, helvetica, sans-serif; background-color: transparent; font-style: normal; "><span> Could you please tell me how to ask questions in mailing list. i have put one question to </span><span style="font-family: Arial, Helvetica, sans-serif, 宋体; font-size: 14.285714149475098px; line-height: 15.714285850524902px; ">petsc-users@mcs.anl.gov, but i get nothing feedback</span></div><div></div><div> </div><div><font face="comic sans ms" size="6"></font> </div><div><br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; margin-top: 5px; padding-left: 5px;"> <div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "> <div style="font-family: 'times new roman',
'new york', times, serif; font-size: 12pt; "> <div dir="ltr"> <hr size="1"> <font size="2" face="Arial"> <b><span style="font-weight:bold;">发件人：</span></b> Jose E. Roman <jroman@dsic.upv.es><br> <b><span style="font-weight: bold;">收件人：</span></b> PETSc users list <petsc-users@mcs.anl.gov> <br> <b><span style="font-weight: bold;">发送日期：</span></b> 2013年4月14日, 星期日, 10:44 下午<br> <b><span style="font-weight: bold;">主题:</span></b> Re: [petsc-users] How to get the eigenvectors in Slepc<br> </font> </div> <div class="y_msg_container"><br><br>El 14/04/2013, a las 08:04, Sonya Blade escribió:<br><br>> Dear All,<br>> <br>> If I have all eigenvalues as real numbers is it possible mathematically that <br>> I get the complex eigenvectors? Because nowhere in my solution I obtain the <br>> complex eigenvalues but Slepc returns the complex for eigenvectors.<br>> <br>> Your enlightenment
will be appreciated.<br>> <br>> Regards, <br><br>If the eigenvector is complex then of course the eigenvalue is complex as well (I assume your matrix is real non-symmetric). You have to get both the real and imaginary parts of the eigenvalue.<br><a href="http://www.grycap.upv.es/slepc/documentation/current/docs/manualpages/EPS/EPSGetEigenpair.html" target="_blank">http://www.grycap.upv.es/slepc/documentation/current/docs/manualpages/EPS/EPSGetEigenpair.html</a><br><br>An alternative is to do all the computation in complex arithmetic (configure --with-scalar-type=complex).<br><br>Jose<br><br><br><br></div> </div> </div> </blockquote></div> </div></body></html>