1 “... operator theory in Hilbert and Krein spaces and contains a collection of original research papers written...”

2 “... on Operator Theory in Krein Spaces and Nonlinear Eigenvalue Problems, which was held at the Technische...”

3 Table of Contents: “... in Almost Pontryagin Spaces -- On a Kre?n Criterion -- Two-sided Weighted Shifts Are ‘Almost Krein’ Normal...”

4 Table of Contents: “...Linear Operators in Almost Krein Spaces -- Generalized Resolvents of a Class of Symmetric Operators...”