2 papers
math.FA2026
Hermitian Pencils and their Representation in Krein Spaces
Rabeb Aydi, Omaima Kchaou, Carsten Trunk
Pencils of the form are studied, where and are bounded linear operators on a Hilbert space. Of interest are the spectral properties of $\mathcal{A…
math.FA2026
On non-negative operators in Krein spaces and their perturbations
Jussi Behrndt, Friedrich M. Philipp, Carsten Trunk
One of the most important contributions of Heinz Langer in the area of operator theory in Krein spaces is the introduction of the notion of definitizable operators and the construc…