We establish quantitative estimates on the structure function arising in the representation of the intertwining wave operators of a Schroedinger operator in three dimensions. Regularity of zero energy is assumed throughout. This paper is related to, and corrects some inaccuracies in, the first author's work this https URL
Beceanu, Marius and Schlag, Wilhelm, "Structure Formulas for Wave Operators" (2017). Mathematics and Statistics Faculty Scholarship. 10.