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We give continued fraction algorithms for a particular class of Fuchsian triangle groups. In particular, we give an explicit form of each such group that is a subgroup of the Hilbert modular group of its trace field and provide an interval…

Number Theory · Mathematics 2011-03-11 Kariane Calta , Thomas Schmidt

We establish arithmetical properties and provide essential bounds for bi-sequences of approximation coefficients associated with the natural extension of maps, leading to continued fraction-like expansions. These maps are realized as the…

Number Theory · Mathematics 2012-11-22 Avraham Bourla

In this paper we investigate multifractal decompositions based on values of Birkhoff averages of functions from a class of symbolically continuous functions. This will be done for an expanding interval map with infinitely many branches and…

Dynamical Systems · Mathematics 2013-02-08 Ai-Hua Fan , Thomas Jordan , Lingmin Liao , Michal Rams

For a positive measure set of nonuniformly expanding quadratic maps on the interval we effect a multifractal formalism, i.e., decompose the phase space into level sets of time averages of a given observable and consider the associated {\it…

Dynamical Systems · Mathematics 2019-02-20 Yong Moo Chung , Hiroki Takahasi

In this paper, we study the multifractal analysis for Markov-R\'{e}nyi maps, which form a canonical class of piecewise differentiable interval maps, with countably many branches and may contain a parabolic fixed point simultaneously, and do…

Dynamical Systems · Mathematics 2025-06-23 Lulu Fang , Carlos Gustavo Moreira , Zhichao Wang , Yiwei Zhang

We statistically compare the relationships between frequencies of digits in continued fraction expansions of typical rational points in the unit interval and higher dimensional generalisations. This takes the form of a Large Deviation and…

Dynamical Systems · Mathematics 2025-07-16 Valérie Berthé , Stephen Cantrell , Jungwon Lee , Mark Pollicott

We employ infinite ergodic theory to show that the even Stern-Brocot sequence and the Farey sequence are uniformly distributed mod 1 with respect to certain canonical weightings. As a corollary we derive the precise asymptotic for the…

Number Theory · Mathematics 2014-06-16 Marc Kesseböhmer , Bernd O. Stratmann

This paper is devoted to study multifractal analysis of quotients of Birkhoff averages for countable Markov maps. We prove a variational principle for the Hausdorff dimension of the level sets. Under certain assumptions we are able to show…

Dynamical Systems · Mathematics 2018-09-18 Godofredo Iommi , Thomas Jordan

The metrical theory of the product of consecutive partial quotients is associated with the uniform Diophantine approximation, specifically to the improvements to Dirichlet's theorem. Achieving some variant forms of metrical theory in…

Number Theory · Mathematics 2023-09-19 Bo Tan , Qing-Long Zhou

We consider a mass-conservative fragmentation of the unit interval. The main purpose of this work is to specify the Hausdorff dimension of the set of locations having exactly an exponential decay. The study relies on an additive martingale…

Probability · Mathematics 2008-07-03 Nathalie Krell

We study the multifractal properties of the uniform approximation exponent and asymptotic approximation exponent in continued fractions. As a corollary, %given a nonnegative reals $\hat{\nu},$ we calculate the Hausdorff dimension of the…

Number Theory · Mathematics 2025-03-12 Bo Tan , Qing-Long Zhou

We apply multifractal analysis to an experimentally obtained quasi-two-dimensional crystal with fourfold symmetry, in order to characterize the sidebranch structure of a dendritic pattern. In our analysis, the stem of the dendritic pattern…

Pattern Formation and Solitons · Physics 2015-06-15 Hiroshi Miki , Haruo Honjo

We prove a result on the structure of a Diophantine spectrum associated with Minkowski diagonal continued fraction.

Number Theory · Mathematics 2013-01-08 Alena Aleksenko

Continued fractions are linked to Stern's diatomic sequence 0,1,1,2,1,3,2,3,1,4,... (given by the recursion relation a_2n=a_n and a_{2n+1} = a_n + a_{n+1}, where a_0=0 and a_1=1), which has long been known. Using a particular…

Combinatorics · Mathematics 2013-09-12 Thomas Garrity

In this paper, we study the multifractal spectrum of Birkhoff averages for non-uniformly expanding R\'{e}nyi interval maps with countably many branches. Our main theorem substantially strengthens conditional variational formulas established…

Dynamical Systems · Mathematics 2025-11-05 Yuya Arima

In this paper we prove a multifractal formalism of Birkhoff averages for interval maps with countably many branches. Furthermore, we prove that under certain regularity assumptions on the potential the Birkhoff spectrum is real analytic.…

Dynamical Systems · Mathematics 2015-11-04 Godofredo Iommi , Thomas Jordan

In this article, we determine the multivariate multifractal Legendre spectra of shifted L{\'e}vy functions. This allows us to explore how the validity of the multivariate multifractal formalism depends on the shift parameter. This article…

Dynamical Systems · Mathematics 2025-05-15 Stéphane Jaffard , Lingmin Liao , Qian Zhang

The celebrated L\'evy--Khintchine theorem is a fundamental limiting law that describes the growth rate of the denominators of the convergents in the continued fraction expansion of a Lebesgue-typical real number. In a recent breakthrough,…

Number Theory · Mathematics 2025-08-04 Gaurav Aggarwal , Anish Ghosh

We study multifractal decompositions based on Birkhoff averages for sequences of functions belonging to certain classes of symbolically continuous functions. We do this for an expanding interval map with countably many branches, which we…

Dynamical Systems · Mathematics 2023-05-15 Tom Rush

The classical Khintchine and Jarn\'ik theorems, generalizations of a consequence of Dirichlet's theorem, are fundamental results in the theory of Diophantine approximation. These theorems are concerned with the size of the set of real…

Number Theory · Mathematics 2022-02-24 Ayreena Bakhtawar , Mumtaz Hussain , Dmitry Kleinbock , Bao-Wei Wang
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