bb1dbb4df62ad90d927f73b9ce46ea5b4fc82fc7
(cherry picked from commit f0b81fefb7)
Eigen is a C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms.
For more information go to http://eigen.tuxfamily.org/.
For pull request, bug reports, and feature requests, go to https://gitlab.com/libeigen/eigen.