Non-Hermitian block Toeplitz matrix sequences possess a spectral distribution given by the geometric mean of the block symbols under GLT theory.
Serra-Capizzano,Spectral theory of matrix-sequences: perspectives of the GLT analysis and beyond, arXiv:2509.19544 (2025)
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A note on the spectral distribution of non-Hermitian block matrices with Toeplitz blocks
Non-Hermitian block Toeplitz matrix sequences possess a spectral distribution given by the geometric mean of the block symbols under GLT theory.