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Ergodic Jacobi matrices and conformal maps

We study structural properties of the Lyapunov exponent $γ$ and the density of states $k$ for ergodic (or just invariant) Jacobi matrices in a general framework. In this analysis, a central role is played by the function $w=-γ+iπk$ as a conformal map between certain domains. This idea goes back to Marchenko and Ostrovskii, who used this device in their analysis of the periodic problem.

preprint2011arXivOpen access
Injo HurChristian Remling
math-phmath.MPmath.SP
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Injo HurChristian Remling

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