Sergei Naboko (St.Petersburg)
On the spectral analysis of unbounded Jacobi operators with a
few gaps in the essential spectrum
Abstract:
Two methods for construction of examples of unbounded selfadjoint Jacobi
operators with a few gaps (bounded and unbounded) in the essential
spectra to be discussed. The relation of the second one to the Last-Simon
approach for the essential spectra calculation is one of the talk goals.