M. Langer

activity

20092023

most citedSchrödinger operators with delta and delta'-potentials supported on hypersurfaces

79 citations · 264 across the 22 of their papers we have counts for

collaborators

Showing 2015Show all

3 papers · 1 filter

math.SP2015

Trace formulae for Schrödinger operators with singular interactions

Jussi Behrndt, Matthias Langer, Vladimir Lotoreichik

Let $Σ \subset R^{d}$ be a $C^{\infty}$ -smooth closed compact hypersurface, which splits the Euclidean space $R^{d}$ into two domains $Ω_{\pm}$ . In this note self-adjoint S…

math.SP2015★ 7 cited

Direct and inverse spectral theorems for a class of canonical systems with two singular endpoints

Matthias Langer, Harald Woracek

Part I of this paper deals with two-dimensional canonical systems $y^{'} (x) = z J H (x) y (x)$ , $x \in (a, b)$ , whose Hamiltonian $H$ is non-negative and locally integrable, and where Weyl's li…

math.SP2015★ 15 cited

Quasi boundary triples and semibounded self-adjoint extensions

Jussi Behrndt, Matthias Langer, Vladimir Lotoreichik +1

In this note semibounded self-adjoint extensions of symmetric operators are investigated with the help of the abstract notion of quasi boundary triples and their Weyl functions. Th…