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Critical circle maps near bifurcation

Jacek Graczyk, Grzegorz Swiatek

math.DSarXiv:math/9201283

Abstract

We estimate harmonic scalings in the parameter space of a one-parameter family of critical circle maps. These estimates lead to the conclusion that the Hausdorff dimension of the complement of the frequency-locking set is less than 1 but not less than 1/3. Moreover, the rotation number is a Hölder continuous function of the parameter.

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