D.8.1 ffsolve_lib multivariate equation solving over finite fields D.8.2 presolve_lib procedures for pre-solving polynomial equations D.8.3 solve_lib procedures to solve polynomial systems D.8.4 triang_lib procedures for decomposing zero-dimensional ideals D.8.5 ntsolve_lib one real solution of polynomial systems (Newton iteration) D.8.6 zeroset_lib procedures for roots and factorization D.8.7 signcond_lib computing realizable sign conditions