• Box approximation and related techniques in spectral theory 

    Borovyk, Vita, 1979- (University of Missouri--Columbia, 2008)
    This dissertation is concerned with various aspects of the spectral theory of differential and pseudodifferential operators. It consists of two chapters. The first chapter presents a study of a family of spectral shift ...
  • Trace formulae in finite von Neumann algebras 

    Skripka, Anna, 1979- (University of Missouri--Columbia, 2007)
    The dissertation is devoted to some aspects of spectral perturbation theory in the context of finite Von Neumann algebras. The central results are analogs of the Birman-Schwinger principle and the Birman-Krein formula for ...