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In [L. Rastelli, et al., hep-th/0111281] the complete set of eigenvectors and eigenvalues of Neumann matrices was found. It was shown also that the spectral density contains a divergent constant piece that being regulated by truncation at level L equals logL 2π. In this Letter we find an exact analytic expression for the finite part of the spectral density. This function allows one to calculate finite...
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