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We prove the first case of polynomially effective equidistribution of closed orbits of semisimple groups with nontrivial centralizer. The proof relies on uniform spectral gap, builds on, and extends work of Einsiedler, Margulis, and…

Dynamical Systems · Mathematics 2019-04-30 Menny Aka , Manfred Einsiedler , Han Li , Amir Mohammadi

We establish the limiting distribution of certain subsets of Farey sequences, i.e., sequences of primitive rational points, on expanding horospheres in covers $\Delta\backslash\mathrm{SL}(n+1,\mathbb{R})$ of…

Dynamical Systems · Mathematics 2017-12-29 Byron Heersink

We prove an effective equidistribution theorem for orbits of certain unipotent subgroups in arithmetic quotients of perfect Lie groups with a polynomial error term. Even for semisimple quotients, our result provides the first infinite…

Dynamical Systems · Mathematics 2026-02-27 Zuo Lin

We record an alternative proof of a recent joint equidistribution result of Blomer and Michel, based on Ratner's topological rigidity theorem. This approach has the advantage of extending to non-uniform lattices.

Dynamical Systems · Mathematics 2024-11-07 Claire Burrin

We establish effective counting and equidistribution results for lattice points in families of domains in hyperbolic spaces, of any dimension and over any field. The domains we focus on are defined as product sets with respect to the…

Dynamical Systems · Mathematics 2016-12-28 Tal Horesh , Amos Nevo

We establish effective equidistribution theorems, with a polynomial error rate, for orbits of unipotent subgroups in quotients of quasi-split, almost simple Linear algebraic groups of absolute rank 2. As an application, inspired by the…

Dynamical Systems · Mathematics 2025-07-22 Elon Lindenstrauss , Amir Mohammadi , Zhiren Wang , Lei Yang

In this note we prove a joint equidistribution result for discrete low lying horocycles. This generalizes previous work of Blomer and Michel, where it was crucially assumed that the number of discrete points is prime.

Number Theory · Mathematics 2025-06-25 Edgar Assing

We consider rational points on the sphere and investigate their equidistribution in shrinking spherical caps. For the two-dimensional sphere, we leverage Hecke operators to obtain a significantly improved small-scale equidistribution bound,…

Number Theory · Mathematics 2025-02-26 Claire Burrin , Matthias Gröbner

In this paper we prove a sparse equidistribution theorem for Gross points over the rational function field $\mathbb{F}_q(t)$. We apply this result to study the reduction map from CM Drinfeld modules to supersingular Drinfeld modules. Our…

Number Theory · Mathematics 2020-03-31 Ahmad El-Guindy , Riad Masri , Matthew Papanikolas , Guchao Zeng

Given a place $\omega$ of a global function field $K$ over a finite field, with associated affine function ring $R_\omega$ and completion $K_\omega$, the aim of this paper is to give an effective joint equidistribution result for…

Number Theory · Mathematics 2025-10-30 Tal Horesh , Frédéric Paulin

We prove an effective equidistribution theorem for semisimple closed orbits on compact adelic quotients. The obtained error depends polynomially on the minimal complexity of intermediate orbits and the complexity of the ambient space. The…

Number Theory · Mathematics 2025-03-28 Manfred Einsiedler , Elon Lindenstrauss , Amir Mohammadi , Andreas Wieser

We prove effective joint equidistribution of several natural parameters associated to primitive vectors in $\mathbb{Z}^{n}$, as the norm of these vectors tends to infinity. These parameters include the direction, the orthogonal lattice, and…

Number Theory · Mathematics 2021-02-19 Tal Horesh , Yakov Karasik

We count primitive lattices of rank $d$ inside $\mathbb{Z}^{n}$ as their covolume tends to infinity, with respect to certain parameters of such lattices. These parameters include, for example, the subsapce that a lattice spans, namely its…

Number Theory · Mathematics 2021-10-29 Tal Horesh , Yakov Karasik

In the framework of infinite ergodic theory, we derive equidistribution results for suitable weighted sequences of cusp points of Hecke triangle groups encoded by group elements of constant word length with respect to a set of natural…

Dynamical Systems · Mathematics 2024-02-08 Laura Breitkopf , Marc Kesseböhmer , Anke Pohl

The present paper is concerned with equidistribution results for certain flows on homogeneous spaces and related questions in Diophantine approximation. Firstly, we answer in the affirmative, a question raised by Kleinbock, Shi and Weiss…

Number Theory · Mathematics 2022-08-01 Mahbub Alam , Anish Ghosh

We prove the mixing conjecture of Michel and Venkatesh for toral packets with negative fundamental discriminants and split at two fixed primes; assuming all splitting fields have no exceptional Landau-Siegel zero. As a consequence we…

Number Theory · Mathematics 2019-02-27 Ilya Khayutin

We prove new equidistribution results for Galois orbits of Heegner points with respect to reduction maps at inert primes. The arguments are based on two different techniques: primitive representations of integers by quadratic forms and…

Number Theory · Mathematics 2011-04-19 Dimitar Jetchev , Ben Kane

In this paper we develope a quantitative non-divergence theorem for translates of horospherical orbits, using the technique of Margulis' inequality as developed by Eskin-Margulis-Mozes and Eskin-Margulis. As we use the Margulis' inequality,…

Dynamical Systems · Mathematics 2023-10-03 Asaf Katz

We asymptotically estimate the variance of the number of lattice points in a thin, randomly rotated annulus lying on the surface of the sphere. This partially resolves a conjecture of Bourgain, Rudnick, and Sarnak. We also obtain estimates…

Number Theory · Mathematics 2022-07-25 Peter Humphries , Maksym Radziwiłł

Let $G=\SL(2,\R)\ltimes(\R^2)^{k}$, let $\Gamma$ be a congruence subgroup of $\SL(2,\Z)\ltimes(\Z^2)^{k}$, and let $u_{\R}=(u_x)_{x\in\R}$ be the one-parameter subgroup of $G$ given by $u_x=\left(\matr 1x01,0\right)$. We prove polynomially…

Dynamical Systems · Mathematics 2026-04-13 Andreas Strömbergsson , Anders Södergren , Pankaj Vishe