90ca5bfd9aa0946774c65d3b04fc33a1b0aa61fa
libeigen/eigen!2322 Closes #2851
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/ or https://libeigen.gitlab.io.
For pull request, bug reports, and feature requests, go to https://gitlab.com/libeigen/eigen.