Description:

BTF permutes an unsymmetric matrix (square or rectangular) into its block upper triangular form (more precisely, it computes a Dulmage-Mendelsohn decomposition). BTF is required by the KLU package.

Copyright, and License:

BTF Copyright (c) 2004-2009, University of Florida. Author: Timothy A. Davis. Distributed under the GNU LGPL license.

Availability:

• Download the current version of BTF itself here.
• Browse the source code.
• Requires the UFconfig package.
• Get all of SuiteSparse here.

Versions:

• BTF-1.1.0.tar.gz (current version)
• BTF-1.0.1.tar.gz
• BTF-1.0.0.tar.gz
• BTF-0.11.0.tar.gz
• BTF-0.9.0.tar.gz
• BTF-0.7.0.tar.gz

References (please cite these when using this software):

• Algorithm 8xx: KLU, a direct sparse solver for circuit simulation problems T. A. Davis and E. Palamadai Natarajan, Submitted to ACM Transactions on Mathematical Software.
• Direct Methods for Sparse Linear Systems, T. A. Davis, SIAM, Philadelphia, Sept. 2006. Part of the SIAM Book Series on the Fundamentals of Algorithms.
• KLU: a "Clark Kent" sparse LU factorization algorithm for circuit matrices, a talk given by Ken Stanley at the 2004 SIAM Conference on Parallel Processing for Scientific Computing (PP04).