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math.SP2026
The butterflies' effects
Siegfried Beckus
This work studies spectral properties of Schrödinger operators in the context of aperiodic order, using weighted Delone sets to explore the interplay between the underlying dynami…
math.SP2024
Spectral estimates of dynamically-defined and amenable operator families
Siegfried Beckus, Alberto Takase
We consider kernel operators defined by a dynamical system. The Hausdorff distance of spectra is estimated by the Hausdorff distance of subsystems. We prove that the spectrum map i…