Frequency-module conjecture for Jacobi matrices of Cantor-type measures
Frequency-module conjecture for Jacobi matrices of Cantor-type measures
Let be the Cantor-type set determined by , and let have recurrence-coefficient sequence . An almost periodic sequence has a frequency module, the module generated by its Fourier frequencies modulo . Frequency-module conjecture. For any , the sequence for is asymptotically almost periodic, and the almost periodic limit has frequency module
modulo . The proposed frequency module reflects the dyadic integrated-density-of-states values observed in the gaps of the Cantor construction; the assertion is based on numerical Fourier-spectrum evidence and remains open.
Sources & referencesView supporting material
Primary source
Gökalp Alpan, Alexander Goncharov and Ahmet Nihat Şimşek, “Asymptotic properties of Jacobi matrices for a family of fractal measures”, arXiv:1603.02312 (2016).
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