Operators and Matrices · Volume 15, Issue 4 The A-model with mutually equal model parameters can lead to a Hilbert space model 15-83 Pages 1319-1336 DOI 10.7153/oam-2021-15-83 Downloads Short PDF Full PDF PNG Authors Rytis Juršėnas Keywords finite rank higher order singular perturbation cascade (A) model Hilbert spaces scale of Hilbert spaces Pontryagin space ordinary boundary triple Krein Q-function Weyl function gamma field symmetric linear relation proper extension resolvent Subject classes 47A56 47B25 47B50 35P05
