Enable usage of schur power series expansion preconditioner. Add an option to use schur power series expansion for initialization of pcg solution in ITERATIVE_SCHUR linear solver. Change-Id: Ifb8bce02bc5f5ceebc74f961eefd3f6dd2ffab4a
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.