Structured Jordan canonical forms for structured matrices that are Hermitian, skew Hermitian or unitary with respect to indefinite inner products. Mehrmann, Volker; Xu, Hongguo — 1999 ELA. The Electronic Journal of Linear Algebra [electronic only]
An analysis of the pole placement problem. II: The multi-input case. Mehrmann, Volker; Xu, Hongguo — 1997 ETNA. Electronic Transactions on Numerical Analysis [electronic only]
An analysis of the pole placement problem I: The single-input case. Mehrmann, Volker; Xu, Hongguo — 1996 ETNA. Electronic Transactions on Numerical Analysis [electronic only]
Perturbation of purely imaginary eigenvalues of Hamiltonian matrices under structured perturbations. Mehrmann, Volker; Xu, Hongguo — 2008 ELA. The Electronic Journal of Linear Algebra [electronic only]
A note on the numerical solution of complex Hamiltonian and skew-Hamiltonian eigenvalue problems. Benner, Peter; Mehrmann, Volker; Xu, Hongguo — 1999 ETNA. Electronic Transactions on Numerical Analysis [electronic only]
Canonical forms for doubly structured matrices and pencils. Mehl, Christian; Mehrmann, Volker; Xu, Hongguo — 2000 ELA. The Electronic Journal of Linear Algebra [electronic only]
A structured staircase algorithm for skew-symmetric/symmetric pencils. Byers, Ralph; Mehrmann, Volker; Xu, Hongguo — 2007 ETNA. Electronic Transactions on Numerical Analysis [electronic only]