fix Eigen3_VERSION Change-Id: Ida3796ec9d5732b284973dbbf0a395f9c5b19a7b
Ceres Solver is an open source C++ library for modeling and solving large, complicated optimization problems. It is a feature rich, mature and performant library which has been used in production at Google since 2010. Ceres Solver can solve two kinds of problems.
Please see ceres-solver.org for more information.