Hamiltonian Realization of spectra

C. B. Manzaneda, R. L. Soto

A $2n\times 2n$ real matrix $A$ is said to be a Hamiltonian matrix if $A^{T}J+JA=0$, where $J=\left(\begin{array}{cc}0& I_n\\ -I_n& 0\end{array}\right)$. Hamiltonian m…