CCOLAMD: constrained column approximate minimum degree ordering
Copyright (C) 2005-2016, Univ. of Florida.  Authors: Timothy A. Davis,
Sivasankaran Rajamanickam, and Stefan Larimore.  Closely based on COLAMD by
Davis, Stefan Larimore, in collaboration with Esmond Ng, and John Gilbert.
http://www.suitesparse.com

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CCOLAMD license: BSD 3-clause:

    Redistribution and use in source and binary forms, with or without
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        * Redistributions in binary form must reproduce the above copyright
          notice, this list of conditions and the following disclaimer in the
          documentation and/or other materials provided with the distribution.
        * Neither the name of the organizations to which the authors are
          affiliated, nor the names of its contributors may be used to endorse
          or promote products derived from this software without specific prior
          written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
    DAMAGE.
