7 citations · 17 across the 19 of their papers we have counts for
Showing 2022Show all
3 papers · 1 filter
math.SP2022
Spectral multiplicity of selfadjoint Schroedinger operators on star-graphs with general interface conditions
Sergey Simonov, Harald Woracek
We consider selfadjoint operators obtained by pasting a finite number of boundary relations with one-dimensional boundary space. A typical example of such an operator is the Schröd…
math.SP2022
A growth estimate for the monodromy matrix of a canonical system
Raphael Pruckner, Harald Woracek
We investigate the spectrum of 2-dimensional canonical systems in the limit circle case. It is discrete and, by the Krein-de Branges formula, cannot be more dense than the integers…
math.SP2022★ 2 cited
Canonical systems whose Weyl coefficients have regularly varying asymptotics
Matthias Langer, Raphael Pruckner, Harald Woracek
For a two-dimensional canonical system on an interval with whose Hamiltonian is a.e.\ positive semidefinite, denote by its Weyl…