Lanczos Methods

TODO Lanczos method description goes here, not implementation specific.

These "at a glance" tables give only the briefest information. For more details, click on a package name to get an overview, and a link to a site dedicated to that package.

Lanczos Methods - Symmetric / Hermitian

 
Package Name
Language Comments
LANCZOS Fortran 77 Lanczos and block Lanczos
LANZ C, Fortran spectral transformation, partial reorthogonalization, accelerated convergence
LASO2 Fortran IV blocked Lanczos
LANSO/PLANSO Fortran 77 partial reorthogonalization, parallel version too
TRLAN Fortran 90 specialized thick restart Lanczos, use when shift-and-invert not possible
IRLM in ARPACK also PARPACK Fortran 77, C++ wrapper implicitly restarted Lanczos
BLZPACK Fortran 77 blocked Lanczos
SILM MATLAB symmetric indefinite Lanczos method

Lanczos Methods - Unsymmetric / Non-Hermitian

 
Package Name
Language Comments
QMRpack's Nonsymmetric Lanczos    
QMRpack's Complex Symmetric Lanczos    
ABLEpack MATLAB has shift and invert capability, full and partial reorthogonalization
Indefinite Symmetric Lanczos    
Band Non-Hermitian Lanczos    

method name list library home