作者: Daniel C. Cohen , Alexander I. Suciu
DOI: 10.1090/S0002-9947-99-02206-0
关键词: Lawrence–Krammer representation 、 Invariant (mathematics) 、 Combinatorics 、 Braid theory 、 Mathematics 、 Homomorphism 、 Monodromy 、 Hyperplane 、 Braid 、 Braid group
摘要: LetA be an arrangement of n complex hyperplanes. The funda- mental group the complement A is determined by a braid monodromy homomorphism, fi : Fs ! Pn. Using Gassner representation pure group, we flnd explicit presentation for Alexander invariant ofA. From this presentation, obtain combinatorial lower bounds ranks Chen groups We also provide criterion when these are attained.