Locus of non-real eigenvalues of a class of linear relations in a Krein space

Rytis Jursenas

It is a classical result that, if a maximal symmetric operator $T$ in a Krein space $\mathcal{H}={\mathcal{H}}^{-}[\oplus ]{\mathcal{H}}^{+}$ has the property $\mathcal{H}^-\subseteq\mathca…