SPEX_LU: a Sparse Left-looking Integer-Preserving LU Factorization

Copyright (c) 2019-2024, Christopher Lourenco, Jinhao Chen,,
Erick Moreno-Centeno, and Timothy A. Davis. All Rights Reserved.

Available at:
    https://github.com/clouren/SPEX
    http://suitesparse.com

Contact Christopher Lourenco, chrisjlourenco@gmail.com, or Tim Davis
(timdavis@aldenmath.com or DrTimothyAldenDavis@gmail.com) for a commercial
license.

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SPEX Left LU is free software; you can redistribute it and/or modify
it under the terms of either:

  * the GNU Lesser General Public License as published by the Free
    Software Foundation; either version 3 of the License, or (at your
    option) any later version.

or

  * the GNU General Public License as published by the Free Software
    Foundation; either version 2 of the License, or (at your option) any
    later version.

or both in parallel, as here.  Each distributor and end-user of SPEX Left LU
may select either license, at their option.

SPEX Left LU is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received copies of the GNU General Public License and the
GNU Lesser General Public License along with this software.  If not,
see https://www.gnu.org/licenses/.