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In 2007, Bogomolov and Tschinkel proved that given two complex elliptic curves $E_1$ and $E_2$ along with even degree-$2$ maps $\pi_j\colon E_j\to \mathbb{P}^1$ having different branch loci, the intersection of the image of the torsion…

Number Theory · Mathematics 2024-11-20 Natalia Garcia-Fritz , Hector Pasten

This work represents a systematic computational study of the distribution of the Fourier coefficients of cuspidal Hecke eigenforms of level $\Gamma_0(4)$ and half-integral weights. Based on substantial calculations, the question is raised…

Number Theory · Mathematics 2021-12-01 Ilker Inam , Zeynep Demirkol Özkaya , Elif Tercan , Gabor Wiese

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

Let $O_D$ be the ring of integers in a division algebra of invariant $1/n$ over a p-adic local field. Drinfeld proved that the moduli problem of special formal $O_D$-modules is representable by Deligne's formal scheme version of the…

Algebraic Geometry · Mathematics 2017-05-23 M. Rapoport , Th. Zink

We give an effective algorithm to determine the endomorphism ring of a Drinfeld module, both over its field of definition and over a separable or algebraic closure thereof. Using previous results we deduce an effective description of the…

Number Theory · Mathematics 2016-08-10 Nikolas Kuhn , Richard Pink

We generalize the framework of tilt-stability to singular schemes and formulate the generalized Bogomolov-Gieseker inequality conjecture of Bayer-Macr\`i-Toda for singular threefolds. We also develop relative versions of these…

Algebraic Geometry · Mathematics 2026-05-14 Zhiyu Liu , Tianle Mao

We show that shifted pairs of discrete or continuous low-lying horocycles equidistribute in the product space of two modular curves.

Number Theory · Mathematics 2024-04-29 Valentin Blomer , Philippe Michel

We formulate a thermodynamical approach to the study of distribution of modular symbols, motivated by the work of Baladi-Vall\'ee. We introduce the modular partitions of continued fractions and observe that the statistics for modular…

Number Theory · Mathematics 2025-08-20 Jungwon Lee , Hae-Sang Sun

Quantum Drinfeld orbifold algebras are the generalizations of Drinfeld orbifold algebras, which are obtained by replacing polynomial rings by quantum polynomial rings. Shepler and Witherspoon in their paper, give necessary and sufficient…

Rings and Algebras · Mathematics 2015-02-10 Piyush Shroff

Let $q$ be a power of the prime number $p$, let $K={\mathbb F}_q(t)$, and let $r\ge 2$ be an integer. For points ${\mathbf a}, {\mathbf b}\in K$ which are $\mathbb{F}_q$-linearly independent, we show that there exist positive constants…

Number Theory · Mathematics 2021-03-02 Dragos Ghioca , Igor Shparlinski

Given any line in the plane, we strengthen the Littlewood conjecture by two logarithms for almost every point on the line, thereby generalising the fibre result of Beresnevich, Haynes, and Velani. To achieve this, we prove an effective…

Dynamical Systems · Mathematics 2023-12-05 Sam Chow , Lei Yang

We consider the question of Quantum Unique Ergodicity for quasimodes on surfaces of constant negative curvature, and conjecture the order of quasimodes that should satisfy QUE. We then show that this conjecture holds for Eisenstein series…

Spectral Theory · Mathematics 2015-02-10 Shimon Brooks

We discuss the proof of Kazhdan and Lusztig of the equivalence of the Drinfeld category D(g,h) of g-modules and the category of finite dimensional Uq(g)-modules, q=exp(\pi ih), for h\in C\Q*. Aiming at operator algebraists the result is…

Quantum Algebra · Mathematics 2007-11-28 Sergey Neshveyev , Lars Tuset

We prove regularity results up to the boundary for time independent generalized Maxwell equations on Riemannian manifolds with boundary using the calculus of alternating differential forms. We discuss homogeneous and inhomogeneous boundary…

Analysis of PDEs · Mathematics 2011-05-23 Peter Kuhn , Dirk Pauly

Assuming everywhere good reduction we generalize the class number formula of Taelman to Drinfeld modules over arbitrary coefficient rings. In order to prove this formula we develop a theory of shtukas and their cohomology.

Number Theory · Mathematics 2018-08-03 M. Mornev

For even dimensional manifolds, we prove some twisted anomaly cancellation formulas which generalize some well-known cancellation formulas. For odd dimensional manifolds, we obtain some modularly invariant characteristic forms by the…

Differential Geometry · Mathematics 2015-05-13 Yong Wang

We describe Rudin-Keisler preorders and distribution functions of numbers of limit models for disjoint unions of Ehrenfeucht theories. Decomposition formulas for these distributions are found.

Logic · Mathematics 2018-02-27 Sergey Sudoplatov

We show that the moduli stacks of Bridgeland semistable objects on smooth projective 3-folds are proper algebraic stacks of finite type, if they satisfy the Bogomolov-Gieseker (BG for short) inequality conjecture proposed by Bayer, Macr\`i…

Algebraic Geometry · Mathematics 2016-01-28 Dulip Piyaratne , Yukinobu Toda

Let G be a compact Lie group. We build a tower of G-spectra over the suspension spectrum of the space of linear isometries from one G-representation to another. The stable cofibres of the maps running down the tower are certain interesting…

Algebraic Topology · Mathematics 2016-01-20 Harry Ullman

In this paper we provide an explicit construction of star products on U(g)-module algebras by using the Fedosov approach. This construction allows us to give a constructive proof to Drinfel'd theorem and to obtain a concrete formula for…

Quantum Algebra · Mathematics 2018-03-16 Chiara Esposito , Jonas Schnitzer , Stefan Waldmann