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math.SP2022
The scattering phase: seen at last
Jeffrey Galkowski, Pierre Marchand, Jian Wang +1
The scattering phase, defined as where is the (unitary) scattering matrix, is the analogue of the counting function for eigenvalues when deali…
math.SP2020
Complete asymptotic expansions of the spectral function for symbolic perturbations of almost periodic Schrödinger operators in dimension one
Jeffrey Galkowski
In this article we consider asymptotics for the spectral function of Schrödinger operators on the real line. Let have the form $$ P:=-\tfrac{…