48 citations · 88 across the 3 of their papers we have counts for
3 papers
math.SP2008★ 6 cited
Schrödinger Operators Defined by Interval Exchange Transformations
Jon Chaika, David Damanik, Helge Krueger
We discuss discrete one-dimensional Schrödinger operators whose potentials are generated by an invertible ergodic transformation of a compact metric space and a continuous real-val…
math.SP2007★ 34 cited
Relative Oscillation Theory for Sturm-Liouville Operators Extended
Helge Krueger, Gerald Teschl
We extend relative oscillation theory to the case of Sturm--Liouville operators with different 's. We show that the weighted number of zeros of Wrons…
math.SP2007★ 48 cited
Relative Oscillation Theory, Weighted Zeros of the Wronskian, and the Spectral Shift Function
Helge Krueger, Gerald Teschl
We develop an analog of classical oscillation theory for Sturm-Liouville operators which, rather than measuring the spectrum of one single operator, measures the difference between…