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In this paper, we perform a multifractal analysis of Birkhoff averages for interval maps with finitely many branches and parabolic fixed points. Using the thermodynamic approach, we strengthen the results of Johansson et al. on the…

Dynamical Systems · Mathematics 2025-10-21 Yuya Arima

We establish a Bombieri-Vinogradov theorem for sectors in real quadratic number fields.

Number Theory · Mathematics 2026-05-01 Stephan Baier , Esrafil Ali Molla

In this work, we establish a representation theorem for multivariable totally symmetric functions: a multisymmetric continuous function must be the composition of a continuous function and a set of generators of the multisymmetric…

Classical Analysis and ODEs · Mathematics 2024-12-25 Chongyao Chen , Ziang Chen , Jianfeng Lu

For all positive integers $k$ and $N$ we prove that there are infinitely many totally real multiquadratic fields $K$ of degree $2^k$ over $\mathbb Q$ such that each universal quadratic form over $K$ has at least $N$ variables.

Number Theory · Mathematics 2019-01-24 Vítězslav Kala , Josef Svoboda

We consider the family of entire maps given by $f_{\ell,c}(z)=\ell+c-(\ell-1)\log c-e^z$, where $c\in D(\ell,1)$ and $\ell\in\mathbb N$, $\ell\geq2$. By using the property of $f_{\ell,c}$ to be dynamically projected to an infinite cylinder…

Dynamical Systems · Mathematics 2024-04-29 Adrián Esparza-Amador

For a large class of separable Banach spaces, we prove the real analytic Dolbeault Isomorphism Theorem for open subsets.

Complex Variables · Mathematics 2007-05-23 Scott Simon

In this article, we present a complete classification, with normal forms, of the real algebraic curves under blow-spherical homeomorphisms at infinity.

Algebraic Geometry · Mathematics 2023-04-28 José Edson Sampaio , Euripedes Carvalho da Silva

We study several classes of holomorphic dynamical systems associated with quadrature domains. Our main result is that real-symmetric polynomials in the principal hyperbolic component of the Mandelbrot set can be conformally mated with a…

Complex Variables · Mathematics 2020-10-05 Kirill Lazebnik

We consider the Cauchy problem for first order systems. Assuming that the set of the singular points of the characteristic variety is a smooth manifold and the characteristic values are real and semi-simple we introduce a new class which is…

Analysis of PDEs · Mathematics 2020-12-23 Tatsuo Nishitani

In this paper we study multi-parameter projection theorems for fractal sets. With the help of these estimates, we recover results about the size of $A \cdot A+...+A \cdot A$, where $A$ is a subset of the real line of a given Hausdorff…

Classical Analysis and ODEs · Mathematics 2011-06-29 B. Erdoğan , D. Hart , A. Iosevich

We study the parameter space of unicritical polynomials $f_c:z\mapsto z^d+c$. For complex parameters, we prove that for Lebesgue almost every $c$, the map $f_c$ is either hyperbolic or infinitely renormalizable. For real parameters, we…

Dynamical Systems · Mathematics 2008-04-15 Artur Avila , Mikhail Lyubich , Weixiao Shen

For the quadratic family $f_{c}(z) = z^2+c$ with $c$ in a hyperbolic component of the Mandelbrot set, it is known that every point in the Julia set moves holomorphically. In this paper we give a uniform derivative estimate of such a motion…

Dynamical Systems · Mathematics 2023-04-25 Yi-Chiuan Chen , Tomoki Kawahira

Given a totally real number field $F$, we show that there are only finitely many totally real extensions of $K$ of a fixed degree that admit a universal quadratic form defined over $F$. We further obtain several explicit classification…

Number Theory · Mathematics 2025-10-27 Vitezslav Kala , Daejun Kim , Seok Hyeong Lee

We consider systems of strict multivariate polynomial inequalities over the reals. All polynomial coefficients are parameters ranging over the reals, where for each coefficient we prescribe its sign. We are interested in the existence of…

Symbolic Computation · Computer Science 2018-09-06 Hoon Hong , Thomas Sturm

We classify the polycyclic totally ordered simple dimension groups, i.e. dimension groups given by a dense embedding of n-dimensional lattice into the real line. Our method is based on the geometry of simple geodesics on the hyperbolic…

Operator Algebras · Mathematics 2016-02-04 Igor Nikolaev

We prove that the set of all paths of a fixed length in a complete multipartite graph is the bases of a matroid. Moreover, we discuss the Cohen-Macaulayness and depth of powers of $t$-path ideals of a complete multipartite graph.

Commutative Algebra · Mathematics 2022-07-26 Mehrdad Nasernejad , Kazem Khashyarmanesh , Ayesha Asloob Qureshi

Under natural assumptions on the observable, we prove a Central Limit Theorem, a Berry-Esseen Theorem, and a quantitative Local Limit Theorem for a broad class of partially hyperbolic endomorphisms of the two-dimensional torus. Our results…

Dynamical Systems · Mathematics 2025-07-21 Roberto Castorrini , Kasun Fernando

A theorem by Wolff states that weights defined on a measurable subset of $\mathbb{R}^n$ and satisfying a Muckenhoupt-type condition can be extended into the whole space as Muckenhoupt weights of the same class. We give a complete and…

Classical Analysis and ODEs · Mathematics 2021-10-26 Emma-Karoliina Kurki , Carlos Mudarra

We show that if F is a totally real field in which p splits completely and f is a mod p Hilbert modular form with parallel weight 2<k<p, which is totally ordinary at p and has tamely ramified Galois representation at all primes dividing p,…

Number Theory · Mathematics 2010-09-07 Toby Gee

We show that $ZF+DC+$"all Turing invariant sets of reals have the perfect set property" implies that all sets of reals have the perfect set property. We also show that this result generalizes to all countable analytic equivalence relations.

Logic · Mathematics 2020-04-06 Clovis Hamel , Haim Horowitz , Saharon Shelah