Randomised twisted Toeplitz spectral-measure conjecture
Randomised twisted Toeplitz spectral-measure conjecture
Let be the symbol on
where are continuous complex-valued functions on . Let be the randomised twisted Toeplitz matrix defined in the source, and let be the weak limit of the eigenvalue-counting measures of the frozen Toeplitz matrices associated with . Define
Randomised twisted Toeplitz spectral-measure conjecture. The measures converge weakly to
This conjecture predicts the same averaged frozen-symbol limit for random sampling points in the symbol as for structured banded perturbations. The supplied source does not state whether the conjecture has been resolved.
Sources & referencesView supporting material
Primary source
Dario Giandinoto and Boris Shapiro, “Structured perturbations of tridiagonal twisted Toeplitz matrices”, arXiv:2604.20617 (2026).
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