3 citations · 5 across the 4 of their papers we have counts for
4 papers
Perturbations of non-autonomous second-order abstract Cauchy problems
Christian Budde, Christian Seifert
In this paper we present time-dependent perturbations of second-order non-autonomous abstract Cauchy problems associated to a family of operators with constant domain. We make use…
Gordon type Theorem for measure perturbation
Christian Seifert
Generalizing the concept of Gordon potentials to measures we prove a version of Gordon's theorem for measures as potentials and show absence of eigenvalues for these one-dimensiona…
On eigenvalue bounds for a general class of Sturm-Liouville operators
Christian Seifert
We consider Sturm-Liouville operators with measure-valued weight and potential, and positive, bounded diffusion coefficient which is bounded away from zero. By means of a local per…
A quantitative version of Gordon's Theorem for Jacobi and Sturm-Liouville operators
Christian Seifert
We prove a quantitative version of Gordon's Theorem concerning absence of eigenvalues for Jacobi matrices and Sturm-Liouville operators with complex coefficients.