TY - JOUR AU - Mehrmann, Volker AU - Xu, Hongguo TI - Perturbation of purely imaginary eigenvalues of Hamiltonian matrices under structured perturbations JO - The electronic journal of linear algebra PY - 2008 SP - 234 EP - 257 VL - 17 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ELA_2008__17__a27/ LA - en ID - ELA_2008__17__a27 ER -