Robuta

https://ceres-solver.googlesource.com/ceres-solver/+/9d74c69130691e43e4ebf65bb57c5371ae355943/internal/ceres/iterative_schur_complement_solver.h internal/ceres/iterative_schur_complement_solver.h - ceres-solver - Git at Google schur complement internal ceres iterative solver https://portal.mardi4nfdi.de/wiki/Publication:449209 Well-quasi-ordering of matrices under Schur complement and applications to directed graphs - MaRDI... well quasi ordering schur complement directed graphs matrices applications