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Let a and b be non-zero rational numbers that are multiplicatively independent. We study the natural density of the set of primes p for which the subgroup of the multiplicative group of the finite field with p elements generated by (a\mod…

Number Theory · Mathematics 2007-05-23 Pieter Moree , Peter Stevenhagen

Let $p$ be an odd prime. In the paper we collect the author's various conjectures on congruences modulo $p$ or $p^2$, which are concerned with sums of binomial coefficients, Lucas sequences, power residues and special binary quadratic…

Number Theory · Mathematics 2013-02-07 Zhi-Hong Sun

For a restricted Lie superalgebra g over an algebraically closed field of characteristic p > 2, we generalize the deformation method of Premet and Skryabin to obtain results on the p-power and 2-power divisibility of dimensions of…

Representation Theory · Mathematics 2009-10-13 Lei Zhao

We describe an algorithm, which - given the characters of tilting modules and assuming that Donkin's tilting conjecture is true - computes the characters of simple modules for an algebraic group in any characteristic.

Representation Theory · Mathematics 2017-09-11 Tobias Kildetoft

A conjecture of Berkovich asserts that every non-simple finite p-group has a non-inner automorphism of order p. This conjecture is far from being proved despite the great effort devoted to it. In this paper we prove it for p-groups of…

Group Theory · Mathematics 2013-01-03 Yassine Guerboussa , Miloud Reguiat

In 2003, H\'{e}thelyi and K\"{u}lshammer proposed that if $G$ is a finite group and $p$ is a prime dividing the group order, then $k(G)\geq 2\sqrt{p-1}$, and they proved this conjecture for solvable $G$ and showed that it is sharp for those…

Group Theory · Mathematics 2023-11-14 Burcu Çınarcı , Thomas Michael Keller

We formulate a series of conjectures on the stable tensor product of irreducible representations of symmetric groups, which are closely related to the reduced Kronecker coefficients. These conjectures are certain generalizations of…

Representation Theory · Mathematics 2026-02-02 Tao Gui

We prove the Identity Theorem for pro-$p$-groups with a single defining relation giving a positive feedback to a question of Serre on the structure of relation modules. A construction of "conjurings" indicates finality of our result in a…

Group Theory · Mathematics 2019-07-05 Andrey Mikhovich

In the paper we consider the following conjecture: if a finite group $G$ possesses a solvable $\pi$-Hall subgroup $H$, then there exist elements $x,y,z,t\in G$ such that the identity $H\cap H^x\cap H^y\cap H^z\cap H^t=O_\pi(G)$ holds. The…

Group Theory · Mathematics 2010-08-17 E. P. Vdovin , V. I. Zenkov

We discuss various recent advances on weak forms of the Twin Prime Conjecture.

Number Theory · Mathematics 2019-11-01 James Maynard

We prove an elementary lemma concerning primitive amalgams and use it to greatly simplify the proof of the Sims conjecture in the case of almost simple groups.

Group Theory · Mathematics 2021-02-15 László Pyber , Gareth Tracey

The world of primes has many gaps between evidence and theorems. Here, we review Legendre's conjecture on primes between consecutive squares and recent progress on the weaker question of primes between consecutive larger powers. Assuming…

Number Theory · Mathematics 2026-02-27 Marc Chamberland , Armin Straub

Recent investigations on the set of commutators between the elements of a finite group having relatively prime orders have prompt us to propose a variant of the Ore conjecture: For every finite non-abelian simple group and for every $g\in…

Group Theory · Mathematics 2025-04-07 Andrea Lucchini , Pablo Spiga

As a sequel to [CS13b], we verify the so-called inductive AM-condition introduced in [Sp12] for simple groups of type A and blocks with maximal defect. This is part of the program set up to verify the Alperin-McKay conjecture through its…

Representation Theory · Mathematics 2014-03-20 Marc Cabanes , Britta Spaeth

We establish character rigidity for all non-uniform higher-rank irreducible lattices in semisimple groups of characteristic other than 2. This implies stabilizer rigidity for probability measure preserving actions and rigidity of invariant…

Group Theory · Mathematics 2025-07-30 Alon Dogon , Michael Glasner , Yuval Gorfine , Liam Hanany , Arie Levit

In this note, we formulate an observation that "almost all" irreducible ordinary characters of finite groups of Lie type remain irreducible when restricted to the derived subgroups. To see this, key ingredients are some asymptotic results…

Representation Theory · Mathematics 2021-07-08 Conghui Li

First a few reformulations of Frankl's conjecture are given, in terms of reduced families or matrices, or analogously in terms of lattices. These lead naturally to a stronger conjecture with a neat formulation which might be easier to…

Combinatorics · Mathematics 2016-03-04 Francesco Marigo , Davide Schipani

We prove many new cases of Zimmer's conjecture for actions by lattices in non-$\mathbb{R}$-split semisimple Lie groups $G$. By prior arguments, Zimmer's conjecture reduces to studying certain probability measures invariant under a minimal…

Dynamical Systems · Mathematics 2024-11-22 Jinpeng An , Aaron Brown , Zhiyuan Zhang

In a private communication, K. Ono conjectured that any mock theta function of weight 1/2 or 3/2 can be congruent modulo a prime $p$ to a weakly holomorphic modular form for just a few values of $p$. In this paper we describe when such a…

Number Theory · Mathematics 2014-02-27 René Olivetto

For a finite set of non-zero natural numbers that contains at least one element different from 1 and the least common multiple of any of its subsets, there exists a subset of at least half of its members which has a common divisor larger…

Number Theory · Mathematics 2018-08-29 Tom Fischer