14 citations · 21 across the 3 of their papers we have counts for
3 papers
math.SP2022
Scattering Matrices for Close Singular Selfadjoint Perturbations of Unbounded Selfadjoint Operators
Vadym Adamyan
In this paper, we consider an unbounded selfadjoint operator and its selfadjoint perturbations in the same Hilbert space . As S.Albeverio and P. Kurosov (2000), we…
math.SP2016★ 14 cited
Dirac-Krein systems on star graphs
Vadym Adamyan, Heinz Langer, Christiane Tretter +1
We study the spectrum of a self-adjoint Dirac-Krein operator with potential on a compact star graph with a finite number of edges. This operator is defined by a Di…
math-ph2007★ 7 cited
Non-negative perturbations of non-negative self-adjoint operators
Vadym Adamyan
Let be a non-negative self-adjoint operator in a Hilbert space and be some densely defined closed restriction of , . I…