[EN] A complex square matrix A is called J-hamiltonian if AT is hermitian where J is a normal real matrix such that J(2) = -I-n. In this paper we solve the problem of finding J-hamiltonian normal solutions for the inverse ...

[ES] En este trabajo se estudia el problema del valor propio inverso para matrices normales J-hamiltonianas. En [Inverse eigenvalue problem for normal J-hamiltonian matrices, Applied Mathematics Letters, 48, 36¿40, ...

The inverse eigenvalue problem and the associated optimal approximation problem for Hermitian reflexive matrices with respect to a normal {k+1}-potent matrix are considered. First, we study the existence of the solutions ...