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On the second Lyapunov exponent of some multidimensional continued fraction algorithms

We study the strong convergence of certain multidimensional continued fraction algorithms. In particular, in the two-dimensional case, we prove that the second Lyapunov exponent of Selmer's algorithm is negative and bound it away from zero. Moreover, we give heuristic results on several other continued fraction algorithms. Our results indicate that all classical multidimensional continued fraction algorithms cease to be strongly convergent for high dimensions. The only exception seems to be the Arnoux-Rauzy algorithm which, however, is defined only on a set of measure zero.

preprint2020arXivOpen access
Valérie BerthéWolfgang SteinerJörg Thuswaldner
math.DSmath.NT
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Valérie BerthéWolfgang SteinerJörg Thuswaldner

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