A. Fleige

most citedThe Riesz basis property of an indefinite Sturm-Liouville problem with non-separated boundary conditions

14 citations · 14 across the 2 of their papers we have counts for

collaborators

2 papers

math.FA2025

Various form closures associated with a fixed non-semibounded self-adjoint operator

Andreas Fleige

If $T$ is a semibounded self-adjoint operator in a Hilbert space $(H, (\cdot, \cdot))$ then the closure of the sesquilinear form $(T \cdot, \cdot)$ is a unique Hilbert space c…

math.SP2013★ 14 cited

The Riesz basis property of an indefinite Sturm-Liouville problem with non-separated boundary conditions

Branko Ćurgus, Andreas Fleige, Aleksey Kostenko

We consider a regular indefinite Sturm-Liouville eigenvalue problem \{ $- f " + q f = λ r f$ } on $[a, b]$ subject to general self-adjoint boundary conditions and with a weight function…