Models of Self-Adjoint and Unitary Operators in Pontryagin Spaces
Models of Self-Adjoint and Unitary Operators in Pontryagin Spaces
This paper represents a revised version of the lectures, delivered by the author at KROMSH-2019. These lectures are devoted to describing a few different ways of constructing a model representation for self-adjoint and unitary operators acting in Pontryagin spaces, and a comparison between them. Two of these models are based …