jwe@che.utexas.edu (John W. Eaton) (06/20/91)
Archive-name: math/num-analysis/utexas-mathlib/1991-06-16 Archive-directory: emx.cc.utexas.edu:/pub/mathlib/ [128.83.1.33] Original-posting-by: jwe@che.utexas.edu (John W. Eaton) Original-subject: Re: LINPACK/EISPACK/BLAS_1_2_3: ??? Reposted-by: emv@msen.com (Edward Vielmetti, MSEN) In article <33568@usc.edu> ajayshah@alhena.usc.edu (Ajay Shah) writes: > > Could someone explain the exact meanings of each of these > libraries? How are they related? All are collections of Fortran subroutines for solving linear algebra problems: Blas: vector, matrix-vector, and matrix-matrix operations (levels 1, 2, and 3 respectively). Linpack: solution of linear equations, matrix determinants and inverses. Uses blas level 1 for low level operations. Eispack: eigenvalue problems, singular value decomposition > If I want a basic linear algebra library today, what is the > state-of-the-art I should be using? My needs are simple -- > bread and butter matrix operations with only one twist: PSD > matrices. Linpack and Eispack are the standards now, Lapack will probably become the standard soon. To find out more about Lapack, send the one line message `send index from lapack' to netlib@netlib.ornl.gov. > (It seems silly getting bulky things like (say) LINPACK via email > from Netlib. Is there an ftp site?) Yes. I know of two sites that have the Blas, Linpack, Eispack, etc. available via anonymous ftp: andy.che.utexas.edu (128.83.162.5) in the directory pub/src/fortran emx.cc.utexas.edu (128.83.1.33) in the directory pub/mathlib -- John W. Eaton | If the odds are a million to one jwe@che.utexas.edu | against something occurring, chances Department of Chemical Engineering | are 50-50 it will. The University of Texas at Austin | -- fortune(1) -- comp.archives file verification emx.cc.utexas.edu total 13 drwxr-xr-x 4 1842 1536 Jan 29 09:41 eispack drwxr-xr-x 5 1842 512 Jan 25 16:41 minpack drwxr-xr-x 5 1842 512 Nov 13 1990 itpack drwxr-xr-x 4 1842 512 Jul 11 1990 odepack drwxr-xr-x 2 1842 512 May 8 1990 blas3 drwxr-xr-x 2 1842 3584 May 2 1990 linpack drwxr-xr-x 2 1842 1536 May 1 1990 blas2 drwxr-xr-x 3 1842 1024 May 1 1990 blas found utexas-mathlib ok emx.cc.utexas.edu:/pub/mathlib/