Add the missing <array> header to fixed_array.h Change-Id: I1f48bd6eab0c6b189d01c68d4940a586a968581f
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.