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We describe the inverse image of the Riemannian exponential map at a basepoint of a compact symmetric space as the disjoint union of so called focal orbits through a maximal torus. These are orbits of a subgroup of the isotropy group acting…

Differential Geometry · Mathematics 2024-04-03 Lucas Seco , Mauro Patrão

We show that finitely generated Abelian groups admit equal growth functions with respect to symmetric generating sets if and only if they have the same rank and the torsion parts have the same parity. In contrast, finitely generated Abelian…

Group Theory · Mathematics 2013-09-16 Clara Loeh , Matthias Mann

The growth of a finitely generated group is an important geometric invariant which has been studied for decades. It can be either polynomial, for a well-understood class of groups, or exponential, for most groups studied by geometers, or…

Group Theory · Mathematics 2018-10-02 Jérémie Brieussel , Thibault Godin , Bijan Mohammadi

We consider endomorphism actions of arbitrary discrete semigroups on a connected metrizable topological group G. We give necessary and sufficient conditions for expansiveness of such actions when G is a Lie group or a compact…

Dynamical Systems · Mathematics 2007-05-23 Siddhartha Bhattacharya

We obtain strong information on the asymptotic behaviour of the counting function for nilpotent Galois extensions with bounded discriminant of arbitrary number fields. This extends previous investigations for the case of abelian groups. In…

Number Theory · Mathematics 2007-05-23 Juergen Klueners , Gunter Malle

We define a large class of abstract Coxeter groups, that we call $\infty$--spanned, and for which the word growth rate and the geodesic growth rate appear to be Perron numbers. This class contains a fair amount of Coxeter groups acting on…

Group Theory · Mathematics 2021-04-20 Alexander Kolpakov , Alexey Talambutsa

Consider the Grothendieck group of finite type projective modular representations of the symmetric groups on n letters, or more generally, of its wreath product with a finite group. They form a graded group, with a product defined using…

Representation Theory · Mathematics 2017-10-13 Hélène Pérennou

In this article we have studied some properties of subharmonic functions in a strongly symmetric Riemannian manifold with a pole. As a generalization of polynomial growth of a function we have introduced the notion of polynomial growth of…

Differential Geometry · Mathematics 2018-06-26 Absos Ali Shaikh , Chandan Kumar Mondal

A periodic geodesic on a surface has a natural lift to the unit tangent bundle; when the complement of this lift is hyperbolic, its volume typically grows as the geodesic gets longer. We give an upper bound for this volume which is linear…

Geometric Topology · Mathematics 2016-05-11 Maxime Bergeron , Tali Pinsky , Lior Silberman

An important aspect in the theory of algebras with polynomial identities is the study of the asymptotic behavior of the codimension sequence $c_n(A),\, n\geq 1,$ which measures the growth of polynomial identities of a given algebra $A$. In…

Rings and Algebras · Mathematics 2025-12-05 Wesley Quaresma Cota , Felipe Yasumura

We realize any submultiplicative increasing function which is equivalent to a polynomial proportion of itself as the growth function of a finitely generated simple Lie algebra. As an application, we resolve two open problems posed by…

Rings and Algebras · Mathematics 2020-07-07 Be'eri Greenfeld

We study quotients of principally polarized abelian varieties with real multiplication by Galois-stable finite subgroups and describe when these quotients are principally polarizable. We use this characterization to provide an algorithm to…

Number Theory · Mathematics 2020-10-01 Alina Dudeanu , Dimitar Jetchev , Damien Robert , Marius Vuille

We show that every finite abelian group $G$ occurs as the group of rational points of an ordinary abelian variety over $\mathbb{F}_2$, $\mathbb{F}_3$ and $\mathbb{F}_5$. We produce partial results for abelian varieties over a general finite…

Number Theory · Mathematics 2025-02-28 Stefano Marseglia , Caleb Springer

Subalgebras of upper triangular matrix algebras have played a fundamental role in the classification of minimal varieties of polynomial growth. Such classification has become a source of study in recent years since it leads to the more…

Rings and Algebras · Mathematics 2025-12-09 Wesley Quaresma Cota , Ana Cristina Vieira

Given an operad P with a finite Groebner basis of relations, we study the generating functions for the dimensions of its graded components P(n). Under moderate assumptions on the relations we prove that the exponential generating function…

Quantum Algebra · Mathematics 2015-01-16 Anton Khoroshkin , Dmitri Piontkovski

We study properties of typical closed geodesics on expander surfaces of high genus, i.e. closed hyperbolic surfaces with a uniform spectral gap of the Laplacian. Under an additional systole lower bound assumption, we show almost every…

Geometric Topology · Mathematics 2026-02-16 Benjamin Dozier , Jenya Sapir

In this note we employ infinite ergodic theory to derive estimates for the algebraic growth rate of the Poincar\'e series for a Kleinian group at its critical exponent of convergence.

Group Theory · Mathematics 2014-06-16 Marc Kesseböhmer , Bernd O. Stratmann

Let M be a geometrically finite pinched negatively curved Riemannian manifold with at least one cusp. We study the asymptotics of the number of geodesics in M starting from and returning to a given cusp, and of the number of horoballs at…

Differential Geometry · Mathematics 2007-05-23 Sa'ar Hersonsky , Frederic Paulin

We show that the space of harmonic functions on a finitely generated infinite group G is finite dimensional if, and only if, G has a finite-index subgroup isomorphic to the integers. A key tool is Wilkie and van den Dries's quantitative…

Group Theory · Mathematics 2013-11-20 Matthew Tointon

Full residual finiteness growth of a finitely generated group $G$ measures how efficiently word metric $n$-balls of $G$ inject into finite quotients of $G$. We initiate a study of this growth over the class of nilpotent groups. When the…

Group Theory · Mathematics 2015-05-04 Khalid Bou-Rabee , Daniel Studenmund