Hello,<br> I have a query regarding the eigenvectors computed in slepc. I am solving a genralized eigenvalue problem. I have attached the A and B matrices with this email. If i run slepc solver with default options are arpack, i get one set of vectors (complex) as solution. If i run with eps_type lapack I get real vectors. A is hermitian, and B is positive definite. ( the actual problem is a schrodinger equation for particle in infinite potential well, so the solution will be of the form sin(x)). I check the solution in matlab using eig(A,B) i get real vectors. Looks like there is some unitary transformation involved here, can you tell me what could be going on. <br>
<br>i copy a small portion of the eigen vector of the lowest magnitude eigenvlaue (=0.0887)<br>---Method: (slepc and eps_type lapack) or matlab-----<br>(-0.101596582735892,0.000000000000000E+000)<br> (-0.200421875537261,0.000000000000000E+000)<br>
(-0.293780182034781,0.000000000000000E+000)<br> (-0.379124930994127,0.000000000000000E+000)<br> ...<br> ...<br> ...<br> (-0.293780182033444,0.000000000000000E+000)<br> (-0.200421875536298,0.000000000000000E+000)<br> (-0.101596582735387,0.000000000000000E+000)<br>
------------------------------------------------------------------------------<br>---Method: (slepc and eps_type defualt or arpack) ----<br><br><br> (5.602609025416389E-002,8.475224384072830E-002)<br> (0.110523934800485,0.167192667375096) (0.162006974547097,0.245072510835553)<br>
(0.209070886310831,0.316267414979582) (0.250431889351034,0.378835368586700)<br> (0.284961763219882,0.431069680779720) (0.311718623092706,0.471545535910556)<br> (0.329972611445050,0.499158857936955) (0.339225807211469,0.513156427631836)<br>
(0.339225807166595,0.513156427588630) (0.329972611486755,0.499158857980068)<br> (0.311718623054404,0.471545535864886) (0.284961763251251,0.431069680822535)<br> (0.250431889322221,0.378835368543795) (0.209070886332945,0.316267415014661)<br>
(0.162006974528570,0.245072510805346) (0.110523934811968,0.167192667394530)<br> (5.602609024797538E-002,8.475224382992022E-002)<br><br><br><br> <br clear="all"><br>-- <br>-----------------------------------------------------<br>
Dharmendar Reddy Palle<br>Graduate Student<br>Microelectronics Research center,<br>University of Texas at Austin,<br>10100 Burnet Road, Bldg. 160<br>MER 2.608F, TX 78758-4445<br>e-mail: <a href="mailto:dharmareddy84@gmail.com">dharmareddy84@gmail.com</a><br>
Phone: +1-512-350-9082<br>United States of America.<br><br>