2 papers
math.CA2025
On Sesquilinear Forms for Lower Semibounded (Singular) Sturm-Liouville Operators
Jussi Behrndt, Fritz Gesztesy, Seppo Hassi +2
Any self-adjoint extension of a (singular) Sturm-Liouville operator bounded from below uniquely leads to an associated sesquilinear form. This form is characterized in terms of pri…
math.FA2025
A generalized Birman-Schwinger principle and applications to one-dimensional Schrödinger operators with distributional potentials
Fritz Gesztesy, Roger Nichols
Given a self-adjoint operator bounded from below in a complex Hilbert space , the corresponding scale of spaces $\mathcal{H}_{+1}(H_0) \subset \mathcal{H} \subse…