Update Travis CI to Bionic & Xcode 11.2 - Fix Homebrew Ruby errors by forcing brew update before install. - Remove use of custom Eigen 3.3.4 on Linux in favour of default Bionic 3.3.4 package. - Update Android NDK version to R20b and build for arm64-v8. - Fix erroneous string -> STRING in iOS toolchain file. Change-Id: I041c2a08b92b8307c12bd8967159beb6984e3c65
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.