Refactor BlockJacobiPreconditioner 1. Rename BlockJacobiPreconditionet to BlockSparseJacobiPreconditioner. 2. Add CompressedRowSparseJacobiPreconditioner which is a block Jacobi preconditioner for CompressedRowSparseMatrix objects. 3. Re-write the tests to be more comprehensive. Change-Id: Icbc91f9ad2cefaad593c11397f8cdcf805d7e118
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.
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