[Trilinos-Users] [EXTERNAL] Anasazi diagonalization test

[Thornquist, Heidi K]

Hi Kwangwoo,

The iterative methods in Anasazi should be used for computing a subset of the eigenvalues of a matrix or matrix pencil.  In general, they should not be used for diagonalizing a sparse matrix (thus computing all the eigenvalues and eigenvectors).  Do you really need all the eigenvalues?

Thanks,
Heidi

--

Heidi K. Thornquist
Electrical Models & Simulation
Sandia National Laboratories
Albuquerque, NM  87185-1323


From: 홍광우 <yuriprime at kaist.ac.kr<mailto:yuriprime at kaist.ac.kr>>
Date: Tuesday, July 15, 2014 5:05 AM
To: "\"trilinos-users at software.sandia.gov<mailto:trilinos-users at software.sandia.gov>\"" <trilinos-users at software.sandia.gov<mailto:trilinos-users at software.sandia.gov>>
Subject: [EXTERNAL] [Trilinos-Users] Anasazi diagonalization test


Dear Trilinos developers and users,


I'm using Anasazi package to diagonalize sparse matrices with Epetra_CrsMatrix.


Mostly, I use LOBPCG solver, but I think that the speed of diagonalizing matrices is little bit slow. So, I want to test LOBPCG solver with my computer setting (compiler, compile option, ...).


Is there any testing sparse matrix or benchmark result? (Given matrix and computing time including parallelization.)


Best regards,


Kwangwoo Hong


Kwangwoo Hong

Ph.D Candidate

Computational Quantum Molecular Science Lab.

Department of Chemistry, KAIST

(Tel) +82-42-350-2855




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