2 papers
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.FA2021
Limit behaviour of Weyl coefficients
Raphael Pruckner, Harald Woracek
We study the sets of radial or nontangential limit points towards of a Nevanlinna function q. Given a nonempty, closed, and connected subset L of , we explicitly co…