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Fortran77 subroutines to solve large scale eigenvalue problems

ARPACK software is capable of solving large scale symmetric, nonsymmetric, and generalized eigenproblems from significant application areas. The software is designed to compute a few (k) eigenvalues with user specified features such as those of largest real part or largest magnitude. Storage requirements are on the order of n*k locations. No auxiliary storage is required. A set of Schur basis vectors for the desired k-dimensional eigen-space is computed which is numerically orthogonal to working precision. Numerically accurate eigenvectors are available on request.

Important Features:

o Reverse Communication Interface. o Single and Double Precision Real Arithmetic Versions for Symmetric, Non-symmetric, o Standard or Generalized Problems. o Single and Double Precision Complex Arithmetic Versions for Standard or Generalized Problems. o Routines for Banded Matrices - Standard or Generalized Problems. o Routines for The Singular Value Decomposition. o Example driver routines that may be used as templates to implement numerous Shift-Invert strategies for all problem types, data types and precision.

Package version:2.1+parpack96.dfsg-1


arpack for Debian

Nothing special here.

 -- Christophe Prud'homme <>, Sun, 24 Dec 2006 14:26:00 +0100


1. You have successfully unbundled ARPACK and are now in the ARPACK 
   directory that was created for you.

2. Recent bug fixes are included in patch.tar.gz and ppatch.tar.gz 
   If you have not retrieved these files, please do so and place them in 
   the directory right above the current directory.  (They should
   be in the same directory where arpack96.tar and parpack96.tar reside).
   Use un


arpack (2.1+parpack96.dfsg-1) unstable; urgency=low

  * New tarball without non-free file, now qualifies for main
    (closes: #491794).
  * Removed libarpack2-dev.doc-base because this was its only file.
  * Modified copyright to indicate downloader and date for current

 -- Adam C. Powell, IV <>  Sun, 30 Nov 2008 11:09:12 -0500

arpack (2.1+parpac


# -*- coding: utf-8 -*-
This package was debianized by Christophe Prud'homme on


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