4 Commits

Author	SHA1	Message	Date
Sameer Agarwal	a9d8ef847f	1. Remove constant_sparsity from LinearSolver::Options. It introduces ... unnecessarily complexity in the structure of linear solvers and preconditioners. This is the first step towards cleaning up the Preconditioner interface. 2. Minor tweaks and cleanups to the various linear solvers.	2012-05-14 02:28:05 -07:00
Keir Mierle	e2a6cdc081	Address some of the comments on CGNR patch ... - Rename BlockDiagonalPreconditioner to BlockJacobiPreconditioner - Include the diagonal in the block jacobi preconditioner. - Better flag help for eta. - Enable test for CGNR - Rename CONJUGATE_GRADIENTS to CGNR. - etc.	2012-05-07 06:39:56 -07:00
Keir Mierle	f7898fba1b	Add a general sparse iterative solver: CGNR ... This adds a new LinearOperator which implements symmetric products of a matrix, and a new CGNR solver to leverage CG to directly solve the normal equations. This also includes a block diagonal preconditioner. In experiments on problem-16, the non-preconditioned version is about 1/5 the speed of SPARSE_SCHUR, and the preconditioned version using block cholesky is about 20% slower than SPARSE_SCHUR.	2012-05-05 20:55:08 -07:00
Keir Mierle	8ebb073038	Initial commit of Ceres Solver.	2012-04-30 23:09:08 -07:00