Effective estimates of ergodic quantities illustrated on the Bolyai-Rényi map

08/08/2023

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by   Mark Pollicott, et al.

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We present a practical and effective method for rigorously estimating quantities associated to top eigenvalues of transfer operators to very high precision. The method combines explicit error bounds of the Lagrange-Chebyshev approximation with an established min-max method. We illustrate its applicability by significantly improving rigorous estimates on various ergodic quantities associated to the Bolyai-Rényi map.