%0 Journal Article
%T Relative Oscillation Theory for Sturm-Liouville Operators Extended
%A Helge Krueger
%A Gerald Teschl
%J Mathematics
%D 2007
%I arXiv
%R 10.1016/j.jfa.2007.10.007
%X We extend relative oscillation theory to the case of Sturm--Liouville operators $H u = r^{-1}(-(pu')'+q u)$ with different $p$'s. We show that the weighted number of zeros of Wronskians of certain solutions equals the value of Krein's spectral shift function inside essential spectral gaps.
%U http://arxiv.org/abs/0707.3451v2