Spectra of tridiagonal Toeplitz matrices
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We consider tridiagonal Toeplitz matrices a(t) = a_{−1}t^{−1}+a_{0}t^{0}+a_{1}t^{1}. Choose the coefficients:
The black ellipse (or segment) is the image of the symbol. The red segment is the Schmidt and Spitzer set. The yellow points are the eigenvalues of the Toeplitz matrix T_{n}(a). Select the order of the matrix:


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