This package uses code from the following packages, which are distributed under the licenses listed below.

Rcpp

by: Dirk Eddelbuettel, Romain Francois, JJ Allaire, Kevin Ushey, Qiang Kou, Nathan Russell, Iñaki Ucar, Doug Bates, and John Chambers

https://cran.r-project.org/web/packages/Rcpp/index.html
https://github.com/RcppCore/Rcpp/tree/master

GNU General Public License v2.0
https://github.com/RcppCore/Rcpp/blob/master/LICENSE
https://github.com/RcppCore/Rcpp/blob/0905d92e0046de5f171d4fde752d97e8733738be/LICENSE

Boost / BH

https://www.boost.org/
https://github.com/boostorg

Boost license 1.0
https://www.boost.org/LICENSE_1_0.txt
https://github.com/boostorg/boost/blob/master/LICENSE_1_0.txt

“Boost Software License - Version 1.0 - August 17th, 2003

Permission is hereby granted, free of charge, to any person or organization obtaining a copy of the software and accompanying documentation covered by this license (the “Software”) to use, reproduce, display, distribute, execute, and transmit the Software, and to prepare derivative works of the Software, and to permit third-parties to whom the Software is furnished to do so, all subject to the following:

The copyright notices in the Software and this entire statement, including the above license grant, this restriction and the following disclaimer, must be included in all copies of the Software, in whole or in part, and all derivative works of the Software, unless such copies or derivative works are solely in the form of machine-executable object code generated by a source language processor.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.”

Eigen

The Eigen project was started by Benoît Jacob (founder) and Gaël Guennebaud (guru). Many other people have since contributed their talents to help make Eigen successful.

https://eigen.tuxfamily.org/
https://gitlab.com/libeigen/eigen

MPL2 (Mozilla Public License)
https://www.mozilla.org/en-US/MPL/2.0/FAQ/