2 papers
math.SP2003
Analogs of the M-Function in the Theory of Orthogonal Polynomials on the Unit Circle
Barry Simon
We show that the multitude of applications of the Weyl-Titchmarsh m-function leads to a multitude of different functions in the theory of orthogonal polynomials on the unit circle…
math.SP2001
Stability of Singular Spectral Types under Decaying Perturbations
A. Kiselev, Y. Last, B. Simon
We look at invariance of a.e. boundary condition spectral behavior under perturbations, , of half-line, continuum or discrete Schrödinger operators. We extend the results of del…