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 2021Show all

2 papers · 1 filter

math.SP2021

Canonical systems whose Weyl coefficients have dominating real part

Matthias Langer, Raphael Pruckner, Harald Woracek

For a two-dimensional canonical system $y^{'} (t) = z J H (t) y (t)$ on the half-line $(0, \infty)$ whose Hamiltonian $H$ is a.e. positive semi-definite, denote by $q_{H}$ its Weyl coefficient.…

math-ph2021

Estimates for the Weyl coefficient of a two-dimensional canonical system

Matthias Langer, Raphael Pruckner, Harald Woracek

For a two-dimensional canonical system $y^{'} (t) = z J H (t) y (t)$ on some interval $(a, b)$ whose Hamiltonian $H$ is a.e. positive semi-definite and which is regular at $a$ and in the limit…