https://com.uvigo.es/en/publicaciones_ecom/comparison-of-iterative-solver-performances-on-multiple-surface-integral-equation-formulations-for-plasmonic-scatterers/
Comparison of Iterative Solver Performances on Multiple Surface Integral Equation Formulations for...
iterative solversurface integralcomparisonperformancesmultiple
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 complementinternalceresiterativesolver