The Filtered Lanczos Package

FILTLAN is a software library written in C/C++ for computing extreme or interior eigenvalues of a symmetric matrix by a polynomial filtered Lanczos procedure. The code for extreme eigenvalues by a standard Lanczos procedure without restarting is also included. In both cases, partial reorthogonalization is provided to improve efficiency. 

The code was primarily written by Haw-ren Fang - a post-doctoral associate in Yousef Saad's group. The technical reports listed below provide details on the techniques used in the package. Online documentation will be available soon.

Related publications

• H. R. Fang and Y. Saad.
  A filtered Lanczos procedure for extreme and interior eigenvalue problems. 
  

  Download:

  [PDF]

  Report umsi-2011-xx, Minnesota Supercomputer Institute, University of Minnesota, Minneapolis, MN, 2011. 
  
  
• Y. Saad.
  Filtered conjugate residual-type algorithms with applications. 
  

  Download:

  [PDF]

  Report umsi-2005-042, Minnesota Supercomputer Institute, University of Minnesota, Minneapolis, MN, 2005. 
  Appeared in SIAM J. Mat. Anal. vol 28, pp. 845-870, (2006).

The work leading to FILTLAN was also greatly influenced by this paper:

• C. Bekas, E. Kokiopoulou, and Y. Saad.
  Polynomial filtered Lanczos iterations with applications in density functional theory. 
  

  Download:

  [PDF]

  Report umsi-2005-117, Minnesota Supercomputer Institute, University of Minnesota, Minneapolis, MN, 2005.

 

Download FILTLAN

 

• Before you download read the COPYRIGHT statement

• Download FILTLAN version 1.0a - gzipped tar file (FILTLAN1.0a.tar.gz)

Contact:

Haw-ren Fang, 该邮件地址已受到反垃圾邮件插件保护。要显示它需要在浏览器中启用 JavaScript。 [Note: main developer] Yousef Saad, 该邮件地址已受到反垃圾邮件插件保护。要显示它需要在浏览器中启用 JavaScript。