Volume 15, Issue 4 Rytis Juršėnas The A-model with mutually equal model parameters can lead to a Hilbert space model Downloads Abstract PDF Full article PDF DOI { copied = true; setTimeout(() => copied = false, 2000) })" :aria-label="copied ? 'DOI copied' : 'Copy DOI'" :title="copied ? 'Copied' : 'Copy DOI'" > Find all available articles from these authors Rytis Juršėnas Find more articles with the same 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 Find more articles with the same subject classes 47A56 47B25 47B50 35P05