2 papers
math.CA2023
Limit point and limit circle trichotomy for Sturm-Liouville problems with complex potentials
Florian Leben, Edison Leguizamón, Carsten Trunk +1
The limit point and limit circle classification of real Sturm-Liouville problems by H. Weyl more than 100 years ago was extended by A.R. Sims around 60 years ago to the case when t…
math-ph2019
Operator based approach to PT-symmetric problems on a wedge-shaped contour
Florian Leben, Carsten Trunk
We consider a second-order differential equation with an eigenvalue parameter . In quantum mechanics…