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We construct (\alpha ,\beta) and \alpha -winning sets in the sense of Schmidt's game, played on the support of certain measures (very friendly and awfully friendly measures) and show how to derive the Hausdorff dimension for some. In…

Number Theory · Mathematics 2010-11-11 Lior Fishman

We prove that for any pair $(s,t)$ of nonnegative numbers with $s+t=1$, the set of two-dimensional $(s,t)$-badly approximable vectors is winning for Schmidt's game. As a consequence, we give a direct proof of Schmidt's conjecture using his…

Number Theory · Mathematics 2016-02-10 Jinpeng An

A badly approximable system of affine forms is determined by a matrix and a vector. We show Kleinbock's conjecture for badly approximable systems of affine forms: for any fixed vector, the set of badly approximable systems of affine forms…

Dynamical Systems · Mathematics 2009-12-30 Manfred Einsiedler , Jimmy Tseng

Winning sets of Schmidt's game enjoy a remarkable rigidity. Therefore, this game (and modifications of it) have been applied to many examples of complete metric spaces (X, d) to show that the set of "badly approximable points", with respect…

Dynamical Systems · Mathematics 2013-09-19 Steffen Weil

Given $b > 1$ and $y \in \mathbb{R}/\mathbb{Z}$, we consider the set of $x\in \mathbb{R}$ such that $y$ is not a limit point of the sequence $\{b^n x \bmod 1: n\in\mathbb{N}\}$. Such sets are known to have full Hausdorff dimension, and in…

Dynamical Systems · Mathematics 2018-09-21 Ryan Broderick , Yann Bugeaud , Lior Fishman , Dmitry Kleinbock , Barak Weiss

In 1998 Kleinbock conjectured that any set of weighted badly approximable $d\times n$ real matrices is a winning subset in the sense of Schmidt's game. In this paper we prove this conjecture in full for vectors in $\mathbf{R}^d$ in…

Number Theory · Mathematics 2020-12-10 Victor Beresnevich , Erez Nesharim , Lei Yang

In this paper we study the classical Schmidt game on two families of sets: one related to frequencies of digits in base-$2$ expansions, and one connected to the set of the badly approximable numbers. Namely, we describe some nontrivial…

Number Theory · Mathematics 2025-11-17 Vasiliy Neckrasov , Eric Zhan

Given an integer nonsingular $n\times n$ matrix $M$ and a point $y \in \mathbb{R}^n/\mathbb{Z}^n$, consider the set $\tilde E(M,y)$ of vectors $x\in \mathbb{R}^n$ such that $y$ is not a limit point of the sequence $\{M^k x \mod…

Dynamical Systems · Mathematics 2018-09-24 Ryan Broderick , Lior Fishman , Dmitry Kleinbock

We introduce a definition of thickness in $\mathbb{R}^d$ and obtain a lower bound for the Hausdorff dimension of the intersection of finitely or countably many thick compact sets using a variant of Schmidt's game. As an application we prove…

Classical Analysis and ODEs · Mathematics 2026-01-26 Kenneth Falconer , Alexia Yavicoli

We prove that the countable intersection of $C^1$-diffeomorphic images of certain Diophantine sets has full Hausdorff dimension. For example, we show this for the set of badly approximable vectors in $\mathbb{R}^d$, improving earlier…

Number Theory · Mathematics 2015-05-28 Ryan Broderick , Lior Fishman , Dmitry Kleinbock , Asaf Reich , Barak Weiss

Schmidt games and the Cantor winning property give alternative notions of largeness, similar to the more standard notions of measure and category. Being intuitive, flexible, and applicable to recent research made them an active object of…

Number Theory · Mathematics 2024-12-11 Dzmitry Badziahin , Stephen Harrap , Erez Nesharim , David Simmons

We prove that the set of bounded geodesics in Teichmuller space are a winning set for Schmidt's game. This is a notion of largeness in a metric space that can apply to measure 0 and meager sets. We prove analogous closely related results on…

Dynamical Systems · Mathematics 2013-12-16 Jonathan Chaika , Yitwah Cheung , Howard Masur

We show that the sets of weighted badly approximable vectors in $\Bbb R^n$ are winning sets of certain games, which are modifications of $(\alpha,\beta)$-games introduced by W. Schmidt in 1966. The latter winning property is stable with…

Number Theory · Mathematics 2011-06-10 Dmitry Kleinbock , Barak Weiss

For any i,j>0 with i+j =1, let Bad(i,j) denote the set of points (x,y) \in R^2 such that max \{ ||qx||^{1/i}, \, ||qy||^{1/j} \} > c/q for some positive constant c = c(x,y) and all q in N. We show that \Bad(i,j) \cap C is winning in the…

Number Theory · Mathematics 2014-09-02 Jinpeng An , Victor Beresnevich , Sanju Velani

For any pair of real numbers $(i,j)$ with $0<i,j<1$ and $i+j=1$, we prove that the set of $p$-adic mixed $(i,j)$-badly approximable numbers $\bad_p(i, j)$ is 1/2-winning in the sense of Schmidt's game. This improves a recent result of…

Number Theory · Mathematics 2013-12-06 Yaqiao Li

We study Manneville-Pomeau maps on the unit interval and prove that the set of points whose forward orbits miss an interval with left endpoint 0 is strong winning for Schmidt's game. Strong winning sets are dense, have full Hausdorff…

Dynamical Systems · Mathematics 2020-10-28 Jason Duvall

Consider a mixing dynamical systems $([0,1], T, \mu)$, for instance a piecewise expanding interval map with a Gibbs measure $\mu$. Given a non-summable sequence $(m_k)$ of non-negative numbers, one may define $r_k (x)$ such that $\mu (B(x,…

Dynamical Systems · Mathematics 2024-05-07 Tomas Persson

J. An (2013) proved that for any $s,t \geq 0$ such that $s + t = 1$, $\mathbf{Bad}(s,t)$ is $(34\sqrt 2)^{-1}$-winning for Schmidt's game. We show that using the main lemma from An's paper one can derive a stronger result, namely that…

Number Theory · Mathematics 2014-09-17 Erez Nesharim , David S. Simmons

In this paper, we prove that if $S\subseteq\mathbb{R}^d$ is hyperplane absolute winning on a closed hyperplane diffuse set $L\subseteq\mathbb{R}^d$, then $\mathrm{dim}_H S\cap K=\mathrm{dim}_H K$ for any irreducible self-conformal set…

Dynamical Systems · Mathematics 2025-12-09 Junjie Huang , Bing Li , Bo Wang , Na Yuan

We consider Schmidt's game on the space of compact subsets of a given metric space equipped with the Hausdorff metric, and the space of continuous functions equipped with the supremum norm. We are interested in determining the generic…

Metric Geometry · Mathematics 2021-03-26 Ábel Farkas , Jonathan M. Fraser , Erez Nesharim , David Simmons
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