e75c29fd9db885feee89896cdb286d2b7fa072c8
libeigen/eigen!2077 Closes #3005 and #2866
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/docs/.
For pull request, bug reports, and feature requests, go to https://gitlab.com/libeigen/eigen.