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math.SP2020
Quantitative spectral perturbation theory for compact operators on a Hilbert space
Ayse Guven, Oscar F. Bandtlow
We introduce compactness classes of Hilbert space operators by grouping together all operators for which the associated singular values decay at a certain speed and establish upper…
math.SP2020★ 4 cited
Numerical resonances for Schottky surfaces via Lagrange-Chebyshev approximation
Oscar Bandtlow, Anke Pohl, Torben Schick +1
We present a numerical method to calculate resonances of Schottky surfaces based on Selberg theory, transfer operator techniques and Lagrange-Chebyshev approximation. This method i…