On skew-Hamiltonian Matrices and their Krylov-Lagrangian Subspaces

Philip Saltenberger, Michel-Niklas Senn

It is a well-known fact that the Krylov space ${\mathcal{K}}_j(H,x)$ generated by a skew-Hamiltonian matrix $H\in {\mathbb{R}}^{2n\times 2n}$ and some $x\in {\mathbb{R}}^{2n}$ is isot…