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We prove an effective version of a result due to Einsiedler, Mozes, Shah and Shapira who established the equidistribution of primitive rational points on expanding horospheres in the space of unimodular lattices in at least $3$ dimensions.…

Number Theory · Mathematics 2021-04-13 Daniel El-Baz , Bingrong Huang , Min Lee

We prove an effective version of a result due to Einsiedler, Mozes, Shah and Shapira on the asymptotic distribution of primitive rational points on expanding closed horospheres in the space of lattices. Key ingredients of our proof include…

Number Theory · Mathematics 2023-07-18 Daniel El-Baz , Min Lee , Andreas Strömbergsson

We prove effective equidistribution of primitive rational points and of primitive rational points defined by monomials along long horocycle orbits in products of the torus and the modular surface. This answers a question posed in joint work…

Dynamical Systems · Mathematics 2022-01-03 Manfred Einsiedler , Manuel Luethi , Nimish Shah

Einsiedler, Mozes, Shah and Shapira [Compos. Math. 152 (2016), 667-692] prove an equidistribution theorem for rational points on expanding horospheres in the space of d-dimensional Euclidean lattices, with d>2. Their proof exploits measure…

Number Theory · Mathematics 2016-09-05 Min Lee , Jens Marklof

We study the limiting distribution of the rational points under a horizontal translation along a sequence of expanding closed horocycles on the modular surface. Using spectral methods we confirm equidistribution of these sample points for…

Dynamical Systems · Mathematics 2024-12-17 Claire Burrin , Uri Shapira , Shucheng Yu

We use spectral method to prove a joint equidistribution of primitive rational points and the same along expanding horocycle orbits in the products of the circle and the unit cotangent bundle of the modular surface. This result explicates…

Number Theory · Mathematics 2021-04-27 Subhajit Jana

In this paper we prove an effective equidistribution result for both primitive and non-primitive points on certain expanding horocycle sections in ASL$(2,\mathbb{Z}) \backslash $ASL$(2,\mathbb{R})$. This provides an effective version of a…

Dynamical Systems · Mathematics 2022-08-23 Sam Pattison

We confirm a conjecture of Jens Marklof regarding the equidistribution of certain sparse collections of points on expanding horospheres. These collections are obtained by intersecting the expanded horosphere with a certain manifold of…

Dynamical Systems · Mathematics 2023-11-29 Manfred Einsiedler , Shahar Mozes , Nimish Shah , Uri Shapira

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

The theory of modular forms and spherical harmonic analysis are applied to establish new best bounds towards the counting and equidistribution of rational points on spheres and other higher dimensional ellipsoids, in what may be viewed as a…

Number Theory · Mathematics 2024-02-01 Claire Burrin , Matthias Gröbner

We consider the notion of mixed multiplicities for multigraded modules by using Hilbert series, and this is later applied to study the projective degrees of rational maps. We use a general framework to determine the projective degrees of a…

Commutative Algebra · Mathematics 2020-04-14 Yairon Cid-Ruiz

The purpose of this short note is to study dominant rational maps from punctual Hilbert schemes of length $k>1$ of projective K3 surfaces $S$ containing infinitely many rational curves. Precisely, we prove that their image is necessarily…

Algebraic Geometry · Mathematics 2016-06-14 Hsueh-Yung Lin

An example of potential density of rational points on the second punctual Hilbert scheme of certain K3 surfaces is treated in detail. This is an amplification of some remarks made by O'Grady and Oguiso.

Algebraic Geometry · Mathematics 2009-07-22 Ekaterina Amerik

Following Zagier, this work studies the rationality and divisibility of Fourier coefficients of meromorphic Hilbert modular forms associated with real quadratic fields, using theta lifts and weak Maass forms. We establish conditions where…

Number Theory · Mathematics 2024-11-04 Baptiste Depouilly

We prove that the Hilbert scheme of points on a normal quasi-projective surface with at worst rational double point singularities is irreducible.

Algebraic Geometry · Mathematics 2017-01-11 Xudong Zheng

The moduli spaces of compact and connected Riemann surfaces has been a central topic in modern mathematics in recent years. Thus their homological dimensions become important invariants. Motivated by the emergence mathematical counterparts…

Quantum Algebra · Mathematics 2020-03-30 Hao Yu

We obtain an analog of the prime number theorem for a class of branched covering maps on the $2$-sphere $S^2$ called expanding Thurston maps, which are topological models of some non-uniformly expanding rational maps without any smoothness…

Dynamical Systems · Mathematics 2024-04-11 Zhiqiang Li , Tianyi Zheng

We give effective bounds for the set quasi-integral points in orbits of non-isotrivial rational maps over function fields under some conditions, generalizing previous work of Hsia and Silverman (2011) for orbits over function fields of…

Number Theory · Mathematics 2020-12-04 Jorge Mello

In this paper, we study maps between moduli spaces of lattice-polarized K3 surfaces induced by sublattices of prime index. We show that these maps can be used to determine if a rational point of the moduli space belongs to the…

Algebraic Geometry · Mathematics 2023-03-29 Domenico Valloni

In this article, we consider a counting problem for orbits of hyperbolic rational maps on the Riemann sphere, where constraints are placed on the multipliers of orbits. Using arguments from work of Dolgopyat, we consider varying and…

Dynamical Systems · Mathematics 2020-10-30 Richard Sharp , Anastasios Stylianou
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