
This package includes software taken from the following sources:


(1) Software for bit packing and unpacking.  Algorithm described in
Daniel Lemire and Leonid Boytsov, Decoding billions of integers per
second through vectorization, Software Practice & Experience 45, 1-29,
2015.

Code obtained from https://github.com/lemire/FastPFor, and covered
under the Apache License, Version 2.0 (ASL2.0), available at
http://www.apache.org/licenses/LICENSE-2.0.  The code was modified for
use in this project.


(2) Software for fast approximate logarithm and exponential
computations.  Code obtained from http://code.google.com/p/fastapprox,
and covered under the following license:

/*=====================================================================*
 *                   Copyright (C) 2012 Paul Mineiro                   *
 * All rights reserved.                                                *
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 *     above copyright notice, this list of conditions and             *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND              *
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,         *
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 *=====================================================================*/
