Scaling-limit conjecture for model 1 and model 2 spectra

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Let nn be the matrix size and let m≤nm\leq n be the model parameter, with fixed parameters δ\delta and aa. Spectral scaling conjecture. For both model 1 and model 2, when nn and mm are sufficiently large, the sizes of the spectra and pseudospectra are determined by the ratio m/nm/n. Consequently, numerical eigenvalue patterns for different pairs (n,m)(n,m) with the same ratio n/mn/m have components of similar sizes when both parameters are sufficiently large. Equivalently, there are nontrivial scaling limits with n→∞n\to\infty, m→∞m\to\infty, and fixed m/n∈(0,1)m/n\in(0,1). This conjectures a ratio-controlled asymptotic regime for both spectral and pseudospectral patterns; the supplied text provides no resolution.

References

Primary source

Saori Morimoto, Makoto Katori and Tomoyuki Shirai, “Eigenvalue and pseudospectrum processes generated by nonnormal Toeplitz matrices with rank 1 perturbations”, arXiv:2401.08129 (2025).

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